Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · August 1, 2024
The first loading of gadolinium (Gd) into Super-Kamiokande in 2020 was successful, and the neutron capture efficiency on Gd reached 50%. To further increase the Gd neutron capture efficiency to 75%, 26.1 tons of Gd2(SO4)3⋅8H2O was additionally loaded into ...
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Journal ArticlePhysical Review D · August 1, 2024
Radioactivity induced by cosmic muon spallation is a dominant source of backgrounds for O(10 MeV) neutrino interactions in water Cherenkov detectors. In particular, it is crucial to reduce backgrounds to measure the solar neutrino spectrum and find neutrin ...
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Journal ArticleJournal of Instrumentation · August 1, 2024
Doping of liquid argon TPCs (LArTPCs) with a small concentration of xenon is a technique for light-shifting and facilitates the detection of the liquid argon scintillation light. In this paper, we present the results of the first doping test ever performed ...
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Journal ArticlePhysical Review D · August 1, 2024
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements from 869 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, lepton ...
Full textCite
Journal ArticleJournal of Instrumentation · August 1, 2024
DUNE is an international experiment dedicated to addressing some of the questions at the forefront of particle physics and astrophysics, including the mystifying preponderance of matter over antimatter in the early universe. The dual-site experiment will e ...
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Journal ArticleAstrophysical Journal · July 1, 2024
Among multimessenger observations of the next Galactic core-collapse supernova, Super-Kamiokande (SK) plays a critical role in detecting the emitted supernova neutrinos, determining the direction to the supernova (SN), and notifying the astronomical commun ...
Full textCite
Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · June 1, 2024
There is a global trend to increase the light yield of CsI scintillators used in neutrino and dark matter detection by operating undoped crystals at cryogenic temperatures. However, high light yield alone is not sufficient to guarantee a low-energy thresho ...
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Journal ArticlePhysical review letters · June 2024
We report a search for time variations of the solar ^{8}B neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiokande measured the precise time of each solar neutrino interaction over 22 ca ...
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Journal ArticlePhysical Review D · May 1, 2024
An analysis of solar neutrino data from the fourth phase of Super-Kamiokande (SK-IV) from October 2008 to May 2018 is performed and the results are presented. The observation time of the dataset of SK-IV corresponds to 2970 days and the total live time for ...
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Journal ArticlePhysical Review D · May 1, 2024
We consider the potential for a 10 kg undoped cryogenic CsI detector operating at the Spallation Neutron Source to measure coherent elastic neutrino-nucleus scattering and its sensitivity to discover new physics beyond the standard model (BSM). Through a c ...
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Journal ArticlePhysical Review D · April 1, 2024
We present a measurement of neutrino oscillation parameters with the Super-Kamiokande detector using atmospheric neutrinos from the complete pure-water SK I-V (April 1996-July 2020) dataset, including events from an expanded fiducial volume. The dataset co ...
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Journal ArticlePhysical Review D · January 1, 2024
We report the first measurement of the atmospheric neutrino-oxygen neutral-current quasielastic (NCQE) cross section in the gadolinium-loaded Super-Kamiokande (SK) water Cherenkov detector. In June 2020, SK began a new experimental phase, named SK-Gd, by l ...
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Journal ArticlePhysical review letters · December 2023
Using an 185-kg NaI[Tl] array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ^{127}I with pion decay-at-rest neutrinos produced by the Spallation Neutron Source at Oak Ridge National Laboratory. Iodine is one the he ...
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Journal ArticlePhysical Review D · December 1, 2023
This paper reports the first measurement of muon neutrino charged-current interactions without pions in the final state using multiple detectors with correlated energy spectra at T2K. The data was collected on hydrocarbon targets using the off-axis T2K nea ...
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Journal ArticlePhysical Review D · November 1, 2023
We report an updated measurement of the νμ-induced, and the first measurement of the ν¯μ-induced coherent charged pion production cross section on C12 nuclei in the Tokai-to-Kamioka experiment. This is measured in a restricted region of the final-state pha ...
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Journal ArticlePhysical Review D · October 1, 2023
Using neutrinos produced at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL), the COHERENT collaboration has studied the Pb(νe,Xn) process with a lead neutrino-induced-neutron (NIN) detector. Data from this detector are fit joint ...
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Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · August 1, 2024
The first loading of gadolinium (Gd) into Super-Kamiokande in 2020 was successful, and the neutron capture efficiency on Gd reached 50%. To further increase the Gd neutron capture efficiency to 75%, 26.1 tons of Gd2(SO4)3⋅8H2O was additionally loaded into ...
Full textCite
Journal ArticlePhysical Review D · August 1, 2024
Radioactivity induced by cosmic muon spallation is a dominant source of backgrounds for O(10 MeV) neutrino interactions in water Cherenkov detectors. In particular, it is crucial to reduce backgrounds to measure the solar neutrino spectrum and find neutrin ...
Full textCite
Journal ArticleJournal of Instrumentation · August 1, 2024
Doping of liquid argon TPCs (LArTPCs) with a small concentration of xenon is a technique for light-shifting and facilitates the detection of the liquid argon scintillation light. In this paper, we present the results of the first doping test ever performed ...
Full textCite
Journal ArticlePhysical Review D · August 1, 2024
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements from 869 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, lepton ...
Full textCite
Journal ArticleJournal of Instrumentation · August 1, 2024
DUNE is an international experiment dedicated to addressing some of the questions at the forefront of particle physics and astrophysics, including the mystifying preponderance of matter over antimatter in the early universe. The dual-site experiment will e ...
Full textCite
Journal ArticleAstrophysical Journal · July 1, 2024
Among multimessenger observations of the next Galactic core-collapse supernova, Super-Kamiokande (SK) plays a critical role in detecting the emitted supernova neutrinos, determining the direction to the supernova (SN), and notifying the astronomical commun ...
Full textCite
Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · June 1, 2024
There is a global trend to increase the light yield of CsI scintillators used in neutrino and dark matter detection by operating undoped crystals at cryogenic temperatures. However, high light yield alone is not sufficient to guarantee a low-energy thresho ...
Full textCite
Journal ArticlePhysical review letters · June 2024
We report a search for time variations of the solar ^{8}B neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiokande measured the precise time of each solar neutrino interaction over 22 ca ...
Full textCite
Journal ArticlePhysical Review D · May 1, 2024
An analysis of solar neutrino data from the fourth phase of Super-Kamiokande (SK-IV) from October 2008 to May 2018 is performed and the results are presented. The observation time of the dataset of SK-IV corresponds to 2970 days and the total live time for ...
Full textCite
Journal ArticlePhysical Review D · May 1, 2024
We consider the potential for a 10 kg undoped cryogenic CsI detector operating at the Spallation Neutron Source to measure coherent elastic neutrino-nucleus scattering and its sensitivity to discover new physics beyond the standard model (BSM). Through a c ...
Full textCite
Journal ArticlePhysical Review D · April 1, 2024
We present a measurement of neutrino oscillation parameters with the Super-Kamiokande detector using atmospheric neutrinos from the complete pure-water SK I-V (April 1996-July 2020) dataset, including events from an expanded fiducial volume. The dataset co ...
Full textCite
Journal ArticlePhysical Review D · January 1, 2024
We report the first measurement of the atmospheric neutrino-oxygen neutral-current quasielastic (NCQE) cross section in the gadolinium-loaded Super-Kamiokande (SK) water Cherenkov detector. In June 2020, SK began a new experimental phase, named SK-Gd, by l ...
Full textCite
Journal ArticlePhysical review letters · December 2023
Using an 185-kg NaI[Tl] array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ^{127}I with pion decay-at-rest neutrinos produced by the Spallation Neutron Source at Oak Ridge National Laboratory. Iodine is one the he ...
Full textCite
Journal ArticlePhysical Review D · December 1, 2023
This paper reports the first measurement of muon neutrino charged-current interactions without pions in the final state using multiple detectors with correlated energy spectra at T2K. The data was collected on hydrocarbon targets using the off-axis T2K nea ...
Full textCite
Journal ArticlePhysical Review D · November 1, 2023
We report an updated measurement of the νμ-induced, and the first measurement of the ν¯μ-induced coherent charged pion production cross section on C12 nuclei in the Tokai-to-Kamioka experiment. This is measured in a restricted region of the final-state pha ...
Full textCite
Journal ArticlePhysical Review D · October 1, 2023
Using neutrinos produced at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL), the COHERENT collaboration has studied the Pb(νe,Xn) process with a lead neutrino-induced-neutron (NIN) detector. Data from this detector are fit joint ...
Full textCite
Journal ArticlePhysical Review D · October 1, 2023
Muon neutrino and antineutrino disappearance probabilities are identical in the standard three-flavor neutrino oscillation framework, but CPT violation and nonstandard interactions can violate this symmetry. In this work we report the measurements of sin2θ ...
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Journal ArticleAnnual Review of Nuclear and Particle Science · September 25, 2023
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory provides an intense, high-quality source of neutrinos from pion decay at rest. This source was recently used for the first measurements of coherent elastic neutrino-nucleus scattering (CE ...
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Journal ArticlePhysics of the Dark Universe · August 1, 2023
Minerals are solid state nuclear track detectors — nuclear recoils in a mineral leave latent damage to the crystal structure. Depending on the mineral and its temperature, the damage features are retained in the material from minutes (in low-melting point ...
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Journal ArticleAstrophysical Journal Letters · July 1, 2023
We report the first search result for the flux of astrophysical electron antineutrinos for energies(10)MeV in the gadolinium-loaded Super-Kamiokande (SK) detector. In 2020 June, gadolinium was introduced to the ultrapure water of the SK detector in order t ...
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Journal ArticleEuropean Physical Journal C · July 1, 2023
The Pandora Software Development Kit and algorithm libraries provide pattern-recognition logic essential to the reconstruction of particle interactions in liquid argon time projection chamber detectors. Pandora is the primary event reconstruction software ...
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Journal ArticleJournal of Physics G: Nuclear and Particle Physics · June 1, 2023
We find that it is possible to increase sensitivity to low energy physics in a third or fourth Deep Underground Neutrino Experiment (DUNE)-like module with careful controls over radiopurity and targeted modifications to a detector similar to the DUNE Far D ...
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Journal ArticlePhysical Review D · June 1, 2023
A primary goal of the upcoming Deep Underground Neutrino Experiment (DUNE) is to measure the O(10) MeV neutrinos produced by a Galactic core-collapse supernova if one should occur during the lifetime of the experiment. The liquid-argon-based detectors plan ...
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Journal ArticlePhysical Review D · May 1, 2023
Measurements of electrons from νe interactions are crucial for the Deep Underground Neutrino Experiment (DUNE) neutrino oscillation program, as well as searches for physics beyond the standard model, supernova neutrino detection, and solar neutrino measure ...
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Journal ArticlePhysical Review D · May 1, 2023
Cosmic-ray muons that enter the Super-Kamiokande detector cause hadronic showers due to spallation in water, producing neutrons and radioactive isotopes. These are a major background source for studies of MeV-scale neutrinos and searches for rare events. I ...
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Journal ArticleJournal of Instrumentation · April 1, 2023
The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowing the implementation of highly-parallelized Monte Carlo simulation chains for particle physics experiments. This technique is particularly suitable for the si ...
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Journal ArticlePhysical review letters · February 2023
The COHERENT Collaboration searched for scalar dark matter particles produced at the Spallation Neutron Source with masses between 1 and 220 MeV/c^{2} using a CsI[Na] scintillation detector sensitive to nuclear recoils above 9 keV_{nr}. No evidence for d ...
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Journal ArticlePhysical review letters · January 2023
We report a search for cosmic-ray boosted dark matter with protons using the 0.37 megaton×years data collected at Super-Kamiokande experiment during the 1996-2018 period (SKI-IV phase). We searched for an excess of proton recoils above the atmospheric neu ...
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Journal ArticleJournal of Physics G: Nuclear and Particle Physics · January 1, 2023
In this paper, we review scientific opportunities and challenges related to detection and reconstruction of low-energy (less than 100 MeV) signatures in liquid argon time-projection chamber (LArTPC) neutrino detectors. LArTPC neutrino detectors designed fo ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2023
The T2K experiment presents new measurements of neutrino oscillation parameters using 19.7(16.3)×1020 protons on target (POT) in (anti-)neutrino mode at the far detector (FD). Compared to the previous analysis, an additional 4.7×1020 POT neutrino data was ...
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Journal ArticleEuropean Physical Journal C · October 1, 2022
Liquid argon time projection chamber detector technology provides high spatial and calorimetric resolutions on the charged particles traversing liquid argon. As a result, the technology has been used in a number of recent neutrino experiments, and is the t ...
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Journal ArticleAstrophysical Journal · October 1, 2022
Super-Kamiokande has been searching for neutrino bursts characteristic of core-collapse supernovae continuously, in real time, since the start of operations in 1996. The present work focuses on detecting more distant supernovae whose event rate may be too ...
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Journal ArticleJournal of Instrumentation · October 1, 2022
We present the development of neutron-tagging techniques in Super-Kamiokande IV using a neural network analysis. The detection efficiency of neutron capture on hydrogen is estimated to be 26%, with a mis-tag rate of 0.016 per neutrino event. The uncertaint ...
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Journal ArticleJournal of Instrumentation · October 1, 2022
The T2K experiment widely uses plastic scintillator as a target for neutrino interactions and an active medium for the measurement of charged particles produced in neutrino interactions at its near detector complex. Over 10 years of operation the measured ...
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Journal ArticleJournal of Instrumentation · October 1, 2022
We present results of several measurements of CsI[Na] scintillation response to 3-60 keV energy nuclear recoils performed by the COHERENT collaboration using tagged neutron elastic scattering experiments and an endpoint technique. Earlier results, used to ...
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Journal ArticlePhysical Review D · October 1, 2022
We searched for proton decay via p→μ+K0 in 0.37 Mton·years of data collected between 1996 and 2018 from the Super-Kamiokande water Cherenkov experiment. The selection criteria were defined separately for KS0 and KL0 channels. No significant event excess ha ...
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Journal ArticlePhysical Review D · September 1, 2022
We use data from the COHERENT CsI[Na] scintillation detector to constrain sub-GeV leptophobic dark matter models. This detector was built to observe low-energy nuclear recoils from coherent elastic neutrino-nucleus scattering. These capabilities enable sea ...
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Journal ArticleAstrophysical Journal · August 1, 2022
In 2020, the Super-Kamiokande (SK) experiment moved to a new stage (SK-Gd) in which gadolinium (Gd) sulfate octahydrate was added to the water in the detector, enhancing the efficiency to detect thermal neutrons and consequently improving the sensitivity t ...
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Journal ArticlePhysical Review D · August 1, 2022
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a pulsed source of neutrons and, as a by-product of this operation, an intense source of pulsed neutrinos via stopped-pion decay. The COHERENT collaboration uses this source to investi ...
Full textCite
Journal ArticlePhysical review letters · August 2022
We measured the cross section of coherent elastic neutrino-nucleus scattering (CEvNS) using a CsI[Na] scintillating crystal in a high flux of neutrinos produced at the Spallation Neutron Source at Oak Ridge National Laboratory. New data collected before de ...
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Journal ArticleProgress of Theoretical and Experimental Physics · August 1, 2022
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,143 new measurements from 709 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, lepton ...
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Journal ArticleAstroparticle Physics · June 1, 2022
Due to a very low production rate of electron anti-neutrinos (ν̄e) via nuclear fusion in the Sun, a flux of solar ν̄e is unexpected. An appearance of ν̄e in solar neutrino flux opens a new window for the new physics beyond the standard model. In particular, a ...
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Journal ArticleProgress in Particle and Nuclear Physics · May 1, 2022
This review demonstrates the unique role of the neutrino by discussing in detail the physics of and with neutrinos. We deal with neutrino sources, neutrino oscillations, absolute masses, interactions, the possible existence of sterile neutrinos, and theore ...
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Journal ArticlePhysical Review D · April 1, 2022
The Deep Underground Neutrino Experiment (DUNE) will produce world-leading neutrino oscillation measurements over the lifetime of the experiment. In this work, we explore DUNE's sensitivity to observe charge-parity violation (CPV) in the neutrino sector, a ...
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ConferenceProceedings of Science · March 18, 2022
Super-Kamiokande (SK) is a 50-kt water Cherenkov detector, instrumented with ∼ 13k photo-multipliers and running since 1996. It is sensitive to neutrinos with energies ranging from 4.5 MeV to several TeV. A new framework has been developed for the follow-u ...
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ConferenceProceedings of Science · March 18, 2022
The radioactivity background are among the most dangerous background for low energy neutrino analysis in Super-Kamiokande (SK), like the solar neutrino analysis. Among them, the main contribution is coming from 222Rn, which is spread in the detector’s wate ...
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ConferenceProceedings of Science · March 18, 2022
We present the results of a search for the Diffuse Supernova Neutrino Background (DSNB) at Super-Kamiokande (SK) that incorporates 22.5 × 2970 kton.days of data from its fourth data-taking phase. Two analyses, with different energy regimes covering the 9.3 ...
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ConferenceProceedings of Science · March 18, 2022
Cosmic-ray muons arise from the showers of secondary particles produced via the interactions of primary cosmic particles with air nuclei at the top of the atmosphere. The interaction products, pions and kaons composing showers mostly decay to muons reflect ...
Cite
Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · March 11, 2022
In order to improve Super-Kamiokande's neutron detection efficiency and to thereby increase its sensitivity to the diffuse supernova neutrino background flux, 13 tons of Gd2(SO4)3⋅8H2O (gadolinium sulfate octahydrate) was dissolved into the detector's othe ...
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Journal ArticleJournal of Instrumentation · March 1, 2022
We present the analysis and results of the first dataset collected with the MARS neutron detector deployed at the Oak Ridge National Laboratory Spallation Neutron Source (SNS) for the purpose of monitoring and characterizing the beam-related neutron (BRN) ...
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Journal ArticleAstrophysical Journal · February 1, 2022
Current neutrino detectors will observe hundreds to thousands of neutrinos from Galactic supernovae, and future detectors will increase this yield by an order of magnitude or more. With such a data set comes the potential for a huge increase in our underst ...
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Journal ArticleJournal of Instrumentation · January 1, 2022
The ProtoDUNE-SP detector is a single-phase liquid argon time projection chamber (LArTPC) that was constructed and operated in the CERN North Area at the end of the H4 beamline. This detector is a prototype for the first far detector module of the Deep Und ...
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Journal ArticleFrontiers in big data · January 2022
In this community review report, we discuss applications and techniques for fast machine learning (ML) in science-the concept of integrating powerful ML methods into the real-time experimental data processing loop to accelerate scientific discovery. ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2022
DUNE is a dual-site experiment for long-baseline neutrino oscillation studies, neutrino astrophysics and nucleon decay searches. ProtoDUNE Dual Phase (DP) is a 6 × 6 × 6 m 3 liquid argon time-projection-chamber (LArTPC) that recorded cosmic-muon data a ...
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Journal ArticlePhysical Review D · December 15, 2021
We have conducted a new search for the diffuse supernova neutrino background (DSNB) flux at Super-Kamiokande (SK), with a 22.5×2970-kton·day exposure from its fourth operational phase IV. With the new analysis we improve on the existing background reductio ...
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Journal ArticleJINST · December 5, 2021
We present the analysis and results of the first dataset collected with the
MARS neutron detector deployed at the Oak Ridge National Laboratory Spallation
Neutron Source (SNS) for the purpose of monitoring and characterizing the
beam-related neutron (BRN) ...
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Journal ArticleInstruments · December 1, 2021
The Deep Underground Neutrino Experiment (DUNE) is an international, world-class experiment aimed at exploring fundamental questions about the universe that are at the forefront of astrophysics and particle physics research. DUNE will study questions perta ...
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Journal Article · November 3, 2021
We present results of several measurements of CsI[Na] scintillation response
to 3-60 keV energy nuclear recoils performed by the COHERENT collaboration
using tagged neutron elastic scattering experiments and an endpoint technique.
Earlier results, used to ...
Open AccessLink to itemCite
Journal ArticleJournal of Cosmology and Astroparticle Physics · November 1, 2021
Core-collapse supernovae are fascinating astrophysical objects for multimessenger studies. Gravitational waves are expected to play an important role in the supernova explosion mechanism. Unfortunately, their modeling is challenging, due to the stochastic ...
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Journal Article · October 21, 2021
The COHERENT collaboration searched for scalar dark matter particles produced
at the Spallation Neutron Source with masses between 1 and 220~MeV/c$^2$ using
a CsI[Na] scintillation detector sensitive to nuclear recoils above
9~keV$_\text{nr}$. No evidence ...
Open AccessLink to itemCite
Journal Article · October 14, 2021
We measured the cross section of coherent elastic neutrino-nucleus scattering
(\cevns{}) using a CsI[Na] scintillating crystal in a high flux of neutrinos
produced at the Spallation Neutron Source (SNS) at Oak Ridge National
Laboratory. New data collected ...
Open AccessLink to itemCite
Journal ArticleJournal of Cosmology and Astroparticle Physics · October 1, 2021
The observation of 236 MeV muon neutrinos from kaon-decay-at-rest (KDAR) originating in the core of the Sun would provide a unique signature of dark matter annihilation. Since excellent angle and energy reconstruction are necessary to detect this monoenerg ...
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Journal ArticleProgress of Theoretical and Experimental Physics · October 1, 2021
A search for neutrinos produced in coincidence with gamma-ray bursts (GRBs) was conducted with the Super-Kamiokande (SK) detector. Between December 2008 and March 2017, the Gamma-ray Coordinates Network recorded 2208 GRBs that occurred during normal SK ope ...
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Journal Article · September 22, 2021
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a
pulsed source of neutrons and, as a byproduct of this operation, an intense
source of pulsed neutrinos via stopped-pion decay. The COHERENT collaboration
uses this source to investig ...
Open AccessLink to itemCite
Journal ArticleAstrophysical Journal · September 10, 2021
The Super-Kamiokande detector can be used to search for neutrinos in time coincidence with gravitational waves detected by the LIGO–Virgo Collaboration (LVC). Both low-energy (7–100 MeV) and high-energy (0.1–105 GeV) samples were analyzed in order to cover ...
Full textCite
Journal Article · September 3, 2021
The Deep Underground Neutrino Experiment (DUNE) will produce world-leading
neutrino oscillation measurements over the lifetime of the experiment. In this
work, we explore DUNE's sensitivity to observe charge-parity violation (CPV) in
the neutrino sector, a ...
Link to itemCite
Journal Article · August 4, 2021
The ProtoDUNE-SP detector is a single-phase liquid argon time projection
chamber (LArTPC) that was constructed and operated in the CERN North Area at
the end of the H4 beamline. This detector is a prototype for the first far
detector module of the Deep Und ...
Link to itemCite
Journal ArticleJournal of Instrumentation · August 1, 2021
We report on the technical design and expected performance of a 592 kg heavy-water-Cherenkov detector to measure the absolute neutrino flux from the pion-decay-at-rest neutrino source at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory ...
Full textOpen AccessCite
Journal ArticlePhysical Review D · June 1, 2021
This paper reports the first T2K measurement of the transverse kinematic imbalance in the single-π+ production channel of neutrino interactions. We measure the differential cross sections in the muon-neutrino charged-current interaction on hydrocarbon with ...
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Journal ArticlePhysical Review D · June 1, 2021
The T2K experiment reports updated measurements of neutrino and antineutrino oscillations using both appearance and disappearance channels. This result comes from an exposure of 14.9(16.4)×1020 protons on target in neutrino (antineutrino) mode. Significant ...
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Journal ArticleProgress of Theoretical and Experimental Physics · April 1, 2021
We report measurements of the flux-integrated and + charged-current cross-sections on water and hydrocarbon targets using the T2K anti-neutrino beam with a mean beam energy of 0.86 GeV. The signal is defined as the (anti-)neutrino charged-current interacti ...
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Journal Article · March 8, 2021
The Deep Underground Neutrino Experiment (DUNE) is a next-generation
long-baseline neutrino oscillation experiment consisting of a high-power,
broadband neutrino beam, a highly capable near detector located on site at
Fermilab, in Batavia, Illinois, and a ...
Link to itemCite
Journal ArticlePhysical Review D · January 21, 2021
As a baryon number violating process with ΔB=2, neutron-antineutron oscillation (n→n¯) provides a unique test of baryon number conservation. We have performed a search for n→n¯ oscillation with bound neutrons in Super-Kamiokande, with the full dataset from ...
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Journal ArticleThe European physical journal. C, Particles and fields · January 2021
The Deep Underground Neutrino Experiment (DUNE) will be a powerful tool for a variety of physics topics. The high-intensity proton beams provide a large neutrino flux, sampled by a near detector system consisting of a combination of capable precision detec ...
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ConferenceProceedings of Science · January 1, 2021
Core-collapse supernovae are expected to produce multimessenger signals. Low-energy neutrinos and gravitational waves are important to study the explosion mechanism of these events. The simulations and detections of gravitational waves from these events ar ...
Cite
Journal Article · December 14, 2020
Due to a very low production rate of electron anti-neutrinos ($\bar{\nu}_e$)
via nuclear fusion in the Sun, we expect to see $\bar{\nu}_e$ from other
contribution. An appearance of $\bar{\nu}_e$ in solar neutrino flux opens a new
window for the new physics ...
Link to itemCite
Journal ArticleReports on progress in physics. Physical Society (Great Britain) · November 2020
The combination of the high intensity proton beam facilities and massive detectors for precision measurements of neutrino oscillation parameters including the charge-parity violating (CPV) phase will open the door to help make beyond the standard model (BS ...
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Journal Article · October 30, 2020
We have searched for proton decay via $p\to e^+\pi^0$ and $p\to \mu^+\pi^0$
modes with the enlarged fiducial volume data of Super-Kamiokande from April
1996 to May 2018, which corresponds to 450 kton$\cdot$years exposure. We have
accumulated about 25% more ...
Link to itemCite
Journal Article · October 21, 2020
We report on the preparation of and calibration measurements with a
$^{83\mathrm{m}}$Kr source for the CENNS-10 liquid argon detector.
$^{83\mathrm{m}}$Kr atoms generated in the decay of a $^{83}$Rb source were
introduced into the detector via injection in ...
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Journal ArticlePhysical Review D · October 9, 2020
We present a search for an excess of neutrino interactions due to dark matter in the form of weakly interacting massive particles (WIMPs) annihilating in the Galactic center or halo based on the data set of Super-Kamiokande-I, -II, -III and -IV taken from ...
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Journal ArticleEuropean Physical Journal C · October 1, 2020
The sensitivity of the Deep Underground Neutrino Experiment (DUNE) to neutrino oscillation is determined, based on a full simulation, reconstruction, and event selection of the far detector and a full simulation and parameterized analysis of the near detec ...
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Journal ArticleJournal of High Energy Physics · October 1, 2020
The electron (anti-)neutrino component of the T2K neutrino beam constitutes the largest background in the measurement of electron (anti-)neutrino appearance at the far detector. The electron neutrino scattering is measured directly with the T2K off-axis ne ...
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Journal Article · August 28, 2020
Now that conventional weakly interacting massive particle (WIMP) dark matter
searches are approaching the neutrino floor, there has been a resurgence of
interest in detectors with sensitivity to nuclear recoil directions. A
large-scale directional detector ...
Link to itemCite
Journal ArticleJournal of Instrumentation · August 1, 2020
The preponderance of matter over antimatter in the early universe, the dynamics of the supernovae that produced the heavy elements necessary for life, and whether protons eventually decay-these mysteries at the forefront of particle physics and astrophysic ...
Full textCite
Journal ArticleJournal of Instrumentation · August 1, 2020
The preponderance of matter over antimatter in the early universe, the dynamics of the supernovae that produced the heavy elements necessary for life, and whether protons eventually decay-these mysteries at the forefront of particle physics and astrophysic ...
Full textCite
Journal ArticleJournal of Instrumentation · August 1, 2020
The preponderance of matter over antimatter in the early universe, the dynamics of the supernovae that produced the heavy elements necessary for life, and whether protons eventually decay-these mysteries at the forefront of particle physics and astrophysic ...
Full textCite
Journal Article · June 22, 2020
Release of COHERENT collaboration data from the first detection of coherent
elastic neutrino-nucleus scattering (CEvNS) on argon. This release corresponds
with the results of "Analysis A" published in Akimov et al., arXiv:2003.10630
[nucl-ex]. Data is shar ...
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Journal ArticlePhysical Review D · June 1, 2020
This paper presents the first combined measurement of the double-differential muon neutrino and antineutrino charged-current cross sections with no pions in the final state on hydrocarbon at the off-axis near detector of the T2K experiment. The data analyz ...
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Journal ArticlePhysical Review D · June 1, 2020
This paper reports the first simultaneous measurement of the double differential muon neutrino charged-current cross section on oxygen and carbon without pions in the final state as a function of the outgoing muon kinematics, made at the ND280 off-axis nea ...
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Journal Article · March 25, 2020
We report the first detection of coherent elastic neutrino-nucleus scattering
(CEvNS) on argon using the CENNS-10 liquid argon detector at the Oak Ridge
National Laboratory Spallation Neutron Source. Two independent analyses prefer
CEvNS over the backgroun ...
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ConferenceJournal of Physics: Conference Series · March 20, 2020
Coherent elastic neutrino-nucleus scattering (CEvNS), the gentlest kind of interaction of a neutrino with an entire nucleus, was first predicted in 1974, but not observed until 2017 by the COHERENT collaboration. COHERENT and many other experiments are pur ...
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Journal Article · February 7, 2020
The preponderance of matter over antimatter in the early universe, the
dynamics of the supernovae that produced the heavy elements necessary for life,
and whether protons eventually decay -- these mysteries at the forefront of
particle physics and astrophy ...
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Journal Article · February 7, 2020
The preponderance of matter over antimatter in the early universe, the
dynamics of the supernovae that produced the heavy elements necessary for life,
and whether protons eventually decay -- these mysteries at the forefront of
particle physics and astrophy ...
Link to itemCite
Journal Article · February 7, 2020
The preponderance of matter over antimatter in the early universe, the
dynamics of the supernovae that produced the heavy elements necessary for life,
and whether protons eventually decay -- these mysteries at the forefront of
particle physics and astrophy ...
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Journal Article · 2020
The Physics Program for the Deep Underground Neutrino Experiment (DUNE) at
the Fermilab Long-Baseline Neutrino Facility (LBNF) is described. ...
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Journal Article · 2020
This document presents the Conceptual Design Report (CDR) put forward by an
international neutrino community to pursue the Deep Underground Neutrino
Experiment at the Long-Baseline Neutrino Facility (LBNF/DUNE), a groundbreaking
science experiment for long ...
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Journal Article · 2020
The Deep Underground Neutrino Experiment (DUNE), a 40-kton underground liquid
argon time projection chamber experiment, will be sensitive to the
electron-neutrino flavor component of the burst of neutrinos expected from the
next Galactic core-collapse supe ...
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Journal ArticleProgress of Theoretical and Experimental Physics · January 1, 2020
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,324 new measurements from 878 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, lepton ...
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ConferenceCPAD Instrumentation Frontier Workshop 2018: New Technologies for Discovery IV (CPAD 2018) Providence, RI, United States, December 9-11, 2018 · 2019Cite
Journal ArticlePhysical Review D · January 26, 2017
The T2K off-axis near detector, ND280, is used to make the first differential cross section measurements of muon neutrino charged current single positive pion production on a water target at energies ∼0.8 GeV. The differential measurements are presented as ...
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ConferenceJournal of Physics: Conference Series · May 1, 2015
I describe physics potential and experimental prospects for coherent elastic neutrino-nucleus scattering (CEvNS), a process which has not yet been observed. Germanium- based detectors represent a promising technology for CEvNS experiments. I focus primaril ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · April 10, 2015
A search for neutron-antineutron (n-n¯) oscillation was undertaken in Super-Kamiokande using the 1489 live-day or 2.45×1034 neutron-year exposure data. This process violates both baryon and baryon minus lepton numbers by an absolute value of two units and ...
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ConferenceProceedings, 12th Meeting of Task-Force on Shielding Aspects of Accelerators, Targets and Irradiation Facilities (SATIF-12): Batavia, IL, USA, April 28-30, 2014 · 2015Cite
Journal ArticlePhysical review letters · November 2014
A Comment on the Letter by J. H. Davis, Phys. Rev. Lett. 113, 081302 (2014)PRLTAO0031-900710.1103/PhysRevLett.113.081302. ...
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Journal ArticlePhysical review letters · September 2014
We present the results of searches for nucleon decay via n→ν[over ¯]π0 and p→ν[over ¯]π+ using data from a combined 172.8 kt·yr exposure of Super-Kamiokande-I,-II, and-III. We set lower limits on the partial lifetime for each of these modes: τn→ν[over ¯]π ...
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Journal ArticleProceedings, 2013 Community Summer Study on the Future of U.S. Particle Physics: Snowmass on the Mississippi (CSS2013): Minneapolis, MN, USA, July 29-August 6, 2013 · 2014Cite
Journal ArticleProceedings, 2013 Community Summer Study on the Future of U.S. Particle Physics: Snowmass on the Mississippi (CSS2013): Minneapolis, MN, USA, July 29-August 6, 2013 · 2014Cite
Journal Article · November 22, 2013
We present a new experimental method for measuring the process of Coherent
Elastic Neutrino Nucleus Scattering (CENNS). This method uses a detector
situated transverse to a high energy neutrino beam production target. This
detector would be sensitive to th ...
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Journal Article · October 16, 2013
This document represents the response of the Intensity Frontier Neutrino
Working Group to the Snowmass charge. We summarize the current status of
neutrino physics and identify many exciting future opportunities for studying
the properties of neutrinos and ...
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ConferenceProceedings - IEEE Virtual Reality · October 7, 2013
Located under Japan's Mount Ikenoyama, the Super-Kamiokande (or 'Super-K') neutrino detector is used to study neutrino particle physics. The Super-K detector consists of a cylindrical stainless steel tank (41.4m tall and 39.3m in diameter) holding 50,000 t ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · August 5, 2013
The T2K Collaboration reports evidence for electron neutrino appearance at the atmospheric mass splitting, |Δm322|≈2.4×10-3 eV2. An excess of electron neutrino interactions over background is observed from a muon neutrino beam with a peak energy of 0.6 GeV ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · May 7, 2013
T2K has performed the first measurement of νμ inclusive charged current interactions on carbon at neutrino energies of ∼1 GeV where the measurement is reported as a flux-averaged double differential cross section in muon momentum and angle. The flux is pre ...
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Journal ArticlePhysical review letters · May 2013
Super-Kamiokande atmospheric neutrino data were fit with an unbinned maximum likelihood method to search for the appearance of tau leptons resulting from the interactions of oscillation-generated tau neutrinos in the detector. Relative to the expectation o ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 2, 2013
The Tokai-to-Kamioka (T2K) experiment studies neutrino oscillations using an off-axis muon neutrino beam with a peak energy of about 0.6 GeV that originates at the Japan Proton Accelerator Research Complex accelerator facility. Interactions of the neutrino ...
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Chapter · January 1, 2013
This chapter tells the story of several decades of experimental physics done deep underground with huge detectors. Not for the first time in the history of science, the most exciting signals were not the ones originally sought. Large underground detectors ...
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Journal ArticleProceedings, 2013 Community Summer Study on the Future of U.S. Particle Physics: Snowmass on the Mississippi (CSS2013): Minneapolis, MN, USA, July 29-August 6, 2013 · 2013Cite
ConferenceProceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 · January 1, 2013
Super-Kamiokande can search for dark matter by detecting neutrinos and muons which are produced by WIMP pair annihilations occur inside the Sun. The huge gravity and hydrogen-rich composition of the Sun combined with high sensitivity of Super-Kamiokande fo ...
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ConferenceProceedings, 2013 Community Summer Study on the Future of U.S. Particle Physics: Snowmass on the Mississippi (CSS2013): Minneapolis, MN, USA, July 29-August 6, 2013 · 2013Cite
ConferenceProceedings, 2013 Community Summer Study on the Future of U.S. Particle Physics: Snowmass on the Mississippi (CSS2013): Minneapolis, MN, USA, July 29-August 6, 2013 · 2013Cite
Journal ArticleProceedings, 2013 Community Summer Study on the Future of U.S. Particle Physics: Snowmass on the Mississippi (CSS2013): Minneapolis, MN, USA, July 29-August 6, 2013 · 2013Cite
Journal ArticleProceedings, 2013 Community Summer Study on the Future of U.S. Particle Physics: Snowmass on the Mississippi (CSS2013): Minneapolis, MN, USA, July 29-August 6, 2013 · 2013Cite
Journal Article · December 20, 2012
This White Paper describes recent progress and future opportunities in the
area of fundamental symmetries and neutrinos. ...
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Journal ArticleAnnual Review of Nuclear and Particle Science · December 3, 2012
A core-collapse supernova will produce an enormous burst of neutrinos of all flavors in the few-tens-of-MeV range. Measurement of the flavor, time, and energy structure of a nearby core-collapse neutrino burst will yield answers to many physics and astroph ...
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Journal Article · November 21, 2012
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory,
Tennessee, provides an intense flux of neutrinos in the few tens-of-MeV range,
with a sharply-pulsed timing structure that is beneficial for background
rejection. In this document, the p ...
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Journal ArticleAstroparticle Physics · August 1, 2012
GUT monopoles captured by the Sun's gravitation are expected to catalyze proton decays via the Callan-Rubakov process. In this scenario, protons, which initially decay into pions, will ultimately produce νe, νμ and ν̄ μ. After undergoing neutrino oscillatio ...
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Journal ArticleNuclear Physics B - Proceedings Supplements · August 1, 2012
This poster describes prospects for measurement of coherent elastic neutrino-nucleus scattering using various potentially available stopped-pion neutrino sources, noting the possibility of detection in dark matter detectors at DUSEL in conjunction with the ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · July 23, 2012
We have searched for proton decay via p→μ +K0 using data from a 91.7kiloton•year exposure of Super-Kamiokande- I, a 49.2kiloton•year exposure of Super-Kamiokande II, and a 31.9kiloton•year exposure of Super-Kamiokande III. The number of candidate events in ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · July 2, 2012
Light sterile neutrinos have been introduced as an explanation for a number of oscillation signals at Δm2∼1eV2. Neutrino oscillations at relatively short baselines provide a probe of these possible new states. This paper describes an accelerator-based expe ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · June 5, 2012
Searches for a nucleon decay into a charged antilepton (e + or μ +) plus a light meson (π0, π -, η, ρ0, ρ -, ω) were performed using the Super-Kamiokande I and II data. Twelve nucleon decay modes were searched for. The total exposure is 140.9kiloton•years, ...
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Journal Article · May 11, 2012
The Proceedings of the 2011 workshop on Fundamental Physics at the Intensity
Frontier. Science opportunities at the intensity frontier are identified and
described in the areas of heavy quarks, charged leptons, neutrinos, proton
decay, new light weakly-cou ...
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Journal ArticleAIP Conference Proceedings · May 10, 2012
DAEδALUS (Decay At rest Experiment for δ studies At the Laboratory for Underground Science) is a new approach to measuring CP violation in the neutrino sector using few-tens-of-MeV neutrinos from decay at rest of pions created by multiple cyclotrons, in co ...
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Journal Article · April 18, 2012
This white paper addresses the hypothesis of light sterile neutrinos based on
recent anomalies observed in neutrino experiments and the latest astrophysical
data. ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · March 22, 2012
A new Super-Kamiokande search for supernova relic neutrinos was conducted using 2853 live days of data. Sensitivity is now greatly improved compared to the 2003 Super-Kamiokande result, which placed a flux limit near many theoretical predictions. This more ...
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Journal ArticleJournal of Physics: Conference Series · January 1, 2012
When a massive star collapses at the end of its life, nearly all of the gravitational binding energy of the resulting remnant is released in the form of neutrinos. The burst of neutrinos from a Galactic core collapse supernova will be detected in neutrino ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2012
This biennial Review summarizes much of particle physics. Using data from previous editions, plus 2658 new measurements from 644 papers, we list, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons. We summarize ...
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Journal ArticleJournal of Physics: Conference Series · January 1, 2012
A new generation of large underground detectors is being planned to further investigate neutrino mass and mixing and to search for possible CP violation that may provide a hint to the origin of our asymmetric universe. Such detectors would also investigate ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · December 14, 2011
In this paper we study nonstandard neutrino interactions as an example of physics beyond the standard model using atmospheric neutrino data collected during the Super-Kamiokande I (1996-2001) and II (2003-2005) periods. We focus on flavor-changing-neutral- ...
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Journal ArticlePhysical review letters · December 2011
We present a search for differences in the oscillations of antineutrinos and neutrinos in the Super-Kamiokande-I, -II, and -III atmospheric neutrino sample. Under a two-flavor disappearance model with separate mixing parameters between neutrinos and antine ...
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Journal ArticleAstrophysical Journal · December 1, 2011
We present the result of an indirect search for high energy neutrinos from Weakly Interacting Massive Particle (WIMP) annihilation in the Sun using upward-going muon (upmu) events at Super-Kamiokande. Data sets from SKI-SKIII (3109.6days) were used for the ...
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Journal ArticleNuclear Physics B - Proceedings Supplements · December 1, 2011
The gravitational core collapse of a star produces a huge burst of neutrinos of all flavors. A number of detectors worldwide are sensitive to such a burst; its detection would yield information about both particle physics and astrophysics. Sensitivity to a ...
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Journal ArticleAIP Conference Proceedings · December 1, 2011
Neutrino interactions in the few to few tens of MeV range are of importance for several physics topics, including solar, supernova and reactor neutrinos, as well as future proposed oscillation and Standard Model test experiments. Although interaction cross ...
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Journal Article · October 26, 2011
In early 2010, the Long-Baseline Neutrino Experiment (LBNE) science
collaboration initiated a study to investigate the physics potential of the
experiment with a broad set of different beam, near- and far-detector
configurations. Nine initial topics were i ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · July 15, 2011
Coherent elastic neutrino-nucleus and weakly interacting massive particle-nucleus interaction signatures are expected to be quite similar. This paper discusses how a next-generation ton-scale dark matter detector could discover neutrino-nucleus coherent sc ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · March 24, 2011
The results of the third phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first and second phase results. With improved detector calibrations, a full detector simulation, and improved analysis methods, the systemat ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · March 16, 2011
In this paper, we report on the measurement of the rate of inclusive π0 production induced by charged-current neutrino interactions in a C 8H8 target at a mean energy of 1.3 GeV in the K2K near detector. Out of a sample of 11606 charged-current neutrino in ...
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Journal ArticleJournal of Physics: Conference Series · January 1, 2011
This talk will summarize the current experimental understanding of neutrino mass and oscillation parameters, and will discuss prospects for future experiments. ...
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Journal ArticleJournal of Physics: Conference Series · January 1, 2011
A core-collapse supernova will emit a neutrino burst that can be detected on Earth. If the neutrinos travel through the Earth before reaching the detector they oscillate via interaction with Earth's matter, yielding oscillations in the neutrino energy spec ...
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Journal ArticleJournal of Physics: Conference Series · January 1, 2011
This talk will describe briefly the physics goals of the Tokai to Kamioka (T2K) experiment, and its current status and prospects. ...
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Journal ArticleJournal of Physics: Conference Series · January 1, 2011
This talk will describe sensitivity of past, current and future water Cherenkov detectors to a burst of supernova neutrinos. ...
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Journal ArticleIEEE Nuclear Science Symposium Conference Record · December 1, 2010
The Helium and Lead Observatory (HALO) is a dedicated supernova detector constructed in the underground facilities at SNOLAB in Sudbury, Canada. It is designed to detect neutrinos from a supernova within the Milky Way galaxy using lead blocks and 3He neutr ...
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Journal Article · June 1, 2010
DAEdALUS, a Decay-At-rest Experiment for delta_CP studies At the Laboratory
for Underground Science, provides a new approach to the search for CP violation
in the neutrino sector. The design utilizes low-cost, high-power proton
accelerators under developme ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · May 20, 2010
We present a search for nonzero θ13 and deviations of sin2θ23 from 0.5 in the oscillations of atmospheric neutrino data from Super-Kamiokande I, II, and III. No distortions of the neutrino flux consistent with nonzero θ13 are found and both neutrino mass h ...
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Journal ArticleClassical and Quantum Gravity · April 14, 2010
We discuss the science motivations and prospects for a joint analysis of gravitational wave (GW) and low-energy neutrino data to search for prompt signals from nearby supernovae (SNe). Both gravitational wave and low-energy neutrinos are expected to be pro ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · February 10, 2010
A nearby core collapse supernova will produce a burst of neutrinos in several detectors worldwide. With reasonably high probability, the Earth will shadow the neutrino flux in one or more detectors. In such a case, for allowed oscillation parameter scenari ...
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Journal Article · October 12, 2009
The Spallation Neutron Source in Oak Ridge, Tennessee, is designed to produce
intense pulsed neutrons for various science and engineering applications.
Copious neutrinos are a free by-product. When it reaches full power, the SNS
will be the world's brighte ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · June 22, 2009
We report the development of a proton identification method for the Super-Kamiokande (SK) detector. This new tool is applied to the search for events with a single proton track, a high purity neutral current sample of interest for sterile neutrino searches ...
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Journal ArticlePhysical review letters · April 2009
We have searched for proton decays via p-->e;{+}pi;{0} and p-->micro;{+}pi;{0} using data from a 91.7 kt.yr exposure of Super-Kamiokande-I and a 49.2 kt.yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced ...
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Journal ArticleAstrophysical Journal · January 1, 2009
We perform a search for neutrinos coincident with GRB 080319B - the brightest GRB observed to date - in a 1000 s window. No statistically significant coincidences were observed and we thereby obtain an upper limit on the fluence of neutrino-induced muons f ...
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Journal ArticleAstrophysical Journal · January 1, 2009
It has been hypothesized that large fluxes of neutrinos may be created in astrophysical "cosmic accelerators." The primary background for a search for astrophysical neutrinos comes from atmospheric neutrinos, which do not exhibit the pointlike directional ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · August 7, 2008
Single charged pion production in charged-current muon neutrino interactions with carbon is studied using data collected in the K2K long-baseline neutrino experiment. The mean energy of the incident muon neutrinos is 1.3 GeV. The data used in this analysis ...
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Journal ArticleAstronomische Nachrichten · March 1, 2008
A core collapse in the Milky Way will produce an enormous burst of neutrinos in detectors world-wide. Such a burst has the potential to provide an early warning of a supernova's appearance. I will describe the nature of the signal, the sensitivity of curre ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · February 25, 2008
The atmospheric neutrino background for proton decay via p→e+π0 in ring imaging water Cherenkov detectors is studied with an artificial accelerator neutrino beam for the first time. In total, 3.14×105 neutrino events corresponding to about 10 megaton-years ...
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Journal ArticleAIP Conference Proceedings · December 1, 2007
The Spallation Neutron Source at Oak Ridge will provide an intense source of neutrinos in the tens of MeV range, which nicely overlaps with the supernova neutrino energy range. I will describe the Neutrinos at the SNS (vSNS) program planned to exploit this ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · March 23, 2007
The relative sidereal variation in the arrival direction of primary cosmic ray nuclei of median energy 10 TeV was measured using downward, through-going muons detected with the Super-Kamiokande-I detector. The projection of the anisotropy map onto the righ ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · October 20, 2006
We present measurements of νμ disappearance in K2K, the KEK to Kamioka long-baseline neutrino oscillation experiment. One-hundred and twelve beam-originated neutrino events are observed in the fiducial volume of Super-Kamiokande with an expectation of 158. ...
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Journal ArticleAstronomische Nachrichten · September 26, 2006
Networks are becoming a key element in most current and all future, telescope and observatory projects. The ability to easily and efficiently pass observation data, alert data and instrumentation requests between distributed systems could enable science as ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · September 20, 2006
The weak nucleon axial-vector form factor for quasielastic interactions is determined using neutrino interaction data from the K2K Scintillating Fiber detector in the neutrino beam at KEK. More than 12000 events are analyzed, of which half are charged-curr ...
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Journal ArticlePhysical review letters · May 2006
We performed an improved search for nu(mu) --> nu(e) oscillation with the KEK to Kamioka (K2K) long-baseline neutrino oscillation experiment, using the full data sample of 9.2 x 10(19) protons on target. No evidence for a nu(e) appearance signal was found, ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · February 28, 2006
Rates of coherent neutrino-nucleus elastic scattering at a high-intensity stopped-pion neutrino source in various detector materials (relevant for novel low-threshold detectors) are calculated. Sensitivity of a coherent neutrino-nucleus elastic scattering ...
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ConferenceAnnual Meeting of the Division of Particles and Fields of the American Physical Society, DPF 2006, and the Annual Fall Meeting of the Japan Particle Physics Community · 2006
• SK-III has been started and is taking data • SK-II data has been updated to its final 791d • Oscillation analysis with SK-I, SK-II data has been performed and shows consistency with final SK-I data set • SK-II shows consistency within the global analysis ...
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ConferenceAnnual Meeting of the Division of Particles and Fields of the American Physical Society, DPF 2006, and the Annual Fall Meeting of the Japan Particle Physics Community · January 1, 2006
• SK-III has been started and is taking data • SK-II data has been updated to its final 791d • Oscillation analysis with SK-I, SK-II data has been performed and shows consistency with final SK-I data set • SK-II shows consistency within the global analysis ...
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Journal ArticleEuropean Physical Journal C · December 1, 2004
The final analysis of atmospheric neutrino events collected with the MACRO detector is presented. Three different classes of events, generated by neutrinos in different energy ranges, are studied looking at rates, angular distributions and estimated energi ...
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Journal ArticleEuropean Physical Journal C · October 1, 2004
We present the final results of the search for stellar gravitational collapses obtained by the MACRO experiment. The detector was active for a stellar collapse search for more than 11 years and it was sensitive to collapses occurring all over in our galaxy ...
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Journal ArticlePhysical review letters · September 2004
Muon neutrino disappearance probability as a function of neutrino flight length L over neutrino energy E was studied. A dip in the L/E distribution was observed in the data, as predicted from the sinusoidal flavor transition probability of neutrino oscilla ...
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Journal ArticleNew Journal of Physics · September 1, 2004
This paper provides a technical description of the SuperNova Early Warning System (SNEWS), an international network of experiments with the goal of providing an early warning of a galactic supernova. ...
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Journal ArticleIEEE Transactions on Nuclear Science · August 1, 2004
The Alpha Magnetic Spectrometer (AMS-02) is an experiment which will be mounted on the international space station (ISS) to measure primary cosmic ray spectra in space. A key element is the transition radiation detector (TRD) to extract an e+ or p- signal ...
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Journal ArticlePhysical review letters · July 2004
A search for a nonzero neutrino magnetic moment has been conducted using 1496 live days of solar neutrino data from Super-Kamiokande-I. Specifically, we searched for distortions to the energy spectrum of recoil electrons arising from magnetic scattering du ...
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Journal ArticlePhysical review letters · July 2004
We present a search for electron neutrino appearance from accelerator-produced muon neutrinos in the K2K long-baseline neutrino experiment. One candidate event is found in the data corresponding to an exposure of 4.8 x 10(19) protons on target. The expecte ...
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Journal ArticleAstroparticle Physics · June 1, 2004
The primary cosmic ray (CR) proton, helium and CNO fluxes in the energy range 80-300 TeV are studied at the National Gran Sasso Laboratories by means of EAS-TOP (Campo Imperatore, 2005 m a.s.l.) and MACRO (deep underground, 3100 m w.e., the surface energy ...
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Journal ArticleAstroparticle Physics · March 1, 2004
The cosmic ray primary composition in the energy range between 1015 and 1016 eV, i.e., around the "knee" of the primary spectrum, has been studied through the combined measurements of the EAS-TOP air shower array (2005 m a.s.l., 105 m2 collecting area) and ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 2004
The time variation of the elastic scattering rate of solar neutrinos with electrons in Super-Kamiokande-I was fit to the variations expected from active two-neutrino oscillations. The best fit in the large mixing angle solution has a mixing angle of [Formu ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 2004
We present the results of indirect searches for Weakly Interacting Massive Particles (WIMPs), with 1679.6 live days of data from the Super-Kamiokande detector using neutrino-induced upward through-going muons. The search is performed by looking for an exce ...
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Journal ArticleAstroparticle Physics · November 1, 2003
Using data collected by the MACRO experiment from 1989 to the end of its operations in 2000, we have studied in the underground muon flux the shadowing effects due to both the Moon and the Sun. We have observed the shadow cast by the Moon at its apparent p ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · July 24, 2003
The energy of atmospheric neutrinos detected by MACRO was estimated using multiple Coulomb scattering of upward throughgoing muons. This analysis allows a test of atmospheric neutrino oscillations, relying on the distortion of the muon energy distribution. ...
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Journal ArticleAstroparticle Physics · June 1, 2003
The MACRO detector was located in the Hall B of the Gran Sasso underground laboratories under an average rock overburden of 3700 hg/cm2. A transition radiation detector composed of three identical modules, covering a total horizontal area of 36 m2, was ins ...
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Journal ArticlePhysical review letters · May 2003
We present the results of a search for low energy nu(e) from the Sun using 1496 days of data from Super-Kamiokande-I. We observe no significant excess of events and set an upper limit for the conversion probability to nu(e) of the 8B solar neutrino. This c ...
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Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · April 1, 2003
Super-Kamiokande is the world's largest water Cherenkov detector, with net mass 50,000 tons. During the period April, 1996 to July, 2001, Super-Kamiokande I collected 1678 live-days of data, observing neutrinos from the Sun, Earth's atmosphere, and the K2K ...
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Journal ArticlePhysical review letters · February 2003
A search for the relic neutrinos from all past core-collapse supernovae was conducted using 1496 days of data from the Super-Kamiokande detector. This analysis looked for electron-type antineutrinos that had produced a positron with an energy greater than ...
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Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · February 1, 2003
Tracking performance of the scintillating fiber detector (SciFi) in the K2K experiment was studied. SciFi was used to reconstruct charged particles produced in neutrino interactions in the near detector. The track reconstruction algorithm and the performan ...
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Journal ArticlePhysical Review D · January 1, 2003
A search for periodic modulations of the solar neutrino flux was performed using the Super-Kamiokande-I data taken from 31 May 1996 to 15 July 2001. The detector's capability of measuring the exact time of events, combined with a relatively high yield of s ...
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Journal ArticleAstroparticle Physics · January 1, 2003
The MACRO underground detector at Gran Sasso Laboratory recorded 60 million secondary cosmic ray muons from February 1989 until December 2000. Different techniques were used to analyze this sample in search for density excesses from astrophysical point-lik ...
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Journal ArticleAstroparticle Physics · January 1, 2003
Many galactic and extragalactic astrophysical sources are currently considered promising candidates as high-energy neutrino emitters. Astrophysical neutrinos can be detected as upward-going muons produced in charged-current interactions with the medium sur ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 2003
We have analyzed 44.3M single muons collected by MACRO from 1991 through 2000 in 2145 live days of operation. We have searched for the solar diurnal, apparent sidereal, and pseudosidereal modulation of the underground muon rate by computing hourly deviatio ...
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Journal ArticlePhysical review letters · January 2003
The K2K experiment observes indications of neutrino oscillation: a reduction of nu(mu) flux together with a distortion of the energy spectrum. Fifty-six beam neutrino events are observed in Super-Kamiokande (SK), 250 km from the neutrino production point, ...
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Journal ArticleNuclear Physics B - Proceedings Supplements · January 1, 2003
We present the final results of the search for exotic massive particles in the cosmic radiation performed with the MACRO underground experiment. Magnetic monopoles and nuclearites flux upper limits obtained with the CR39 nuclear track subdetector, the scin ...
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Journal ArticlePhysical Review Letters · 2003
A study was performed on Kamioka long-baseline neutrino oscillation experiment (K2K). The indications of neutrino oscillation such as a reduction of flux together with a distortion of the energy spectrum were observed in the experiment. In Super Kamiokande ...
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Journal ArticleEuropean Physical Journal C · December 1, 2002
The interaction of a Grand Unification Magnetic Monopole with a nucleon can lead to a barion-number violating process in which the nucleon decays into a lepton and one or more mesons (catalysis of nucleon decay). In this paper we report an experimental stu ...
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Journal ArticleEuropean Physical Journal C · November 1, 2002
We present the final results obtained by the MACRO experiment in the search for GUT magnetic monopoles in the penetrating cosmic radiation, for the range 4 × 10-5 < β < 1. Several searches with all the MACRO sub-detectors (i.e. scintillation counters, limi ...
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Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · October 21, 2002
Muon energy measurement represents an important issue for any experiment addressing neutrino-induced up-going muon studies. Since the neutrino oscillation probability depends on the neutrino energy, a measurement of the muon energy adds an important piece ...
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Journal ArticleAstrophysical Journal · October 10, 2002
Using the Super-Kamiokande neutrino observatory, a search was conducted for neutrinos produced in coincidence with gamma-ray bursts observed by the Burst and Transient Source Experiment detector. Super-Kamiokande data in the neutrino energy range of 7 MeV ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · July 18, 2002
A number of different fits to solar neutrino mixing and mass square difference were performed using 1496 days of Super-Kamiokande-I's solar neutrino data. These data select two allowed areas at large neutrino mixing when combined with either the solar 8B f ...
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Journal ArticleAstroparticle Physics · July 8, 2002
We describe a search method for fast moving (β = v/c > 5 × 10-3) magnetic monopoles using simultaneously the scintillator, streamer tube and track-etch subdetectors of the MACRO apparatus. The first two subdetectors are used primarily for the identificatio ...
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Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · July 1, 2002
MACRO was an experiment that ran in the Laboratori Nazionali del Gran Sasso from 1988 to 2000. Its principal goal was to observe magnetic monopoles or set significantly lower experimental flux limits than had been previously available in the velocity range ...
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Journal ArticleNuclear Physics B - Proceedings Supplements · January 1, 2002
For cosmic particle spectroscopy on the International Space Station the AMS experiment will be equipped with a Transition Radiation Detector to improve proton background supression up to 300 GeV. The TRD has 20 layers of fleece radiator with Xe/CO2 proport ...
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Journal ArticleInternational Journal of Modern Physics A · December 1, 2001
The field of neutrino physics is currently very exciting, with several recent results pointing to new physics. I will give an overview of the current experimental situation, focusing primarily on neutrino oscillation results. The data are not entirely cons ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · September 27, 2001
The angular distribution of upward-going muons produced by atmospheric neutrinos in the rock below the MACRO detector shows anomalies in good agreement with two flavor vμ → vτ oscillations with maximum mixing and Δm2 around 0.0024 eV2. Exploiting the depen ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · July 5, 2001
The KEK to Kamioka long-baseline neutrino experiment (K2K) has begun its investigation of neutrino oscillations suggested by atmospheric neutrino observations. Twenty-eight neutrino events have been detected in coincidence with the expected arrival time of ...
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Journal ArticlePhysical review letters · June 2001
Solar neutrino measurements from 1258 days of data from the Super-Kamiokande detector are presented. The measurements are based on recoil electrons in the energy range 5.0-20.0 MeV. The measured solar neutrino flux is 2.32+/-0.03(stat)+0.08-0.07(syst)x10(6 ...
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Journal ArticlePhysical review letters · June 2001
We report the result of a search for neutrino oscillations using precise measurements of the recoil electron energy spectrum and zenith angle variations of the solar neutrino flux from 1258 days of neutrino-electron scattering data in Super-Kamiokande. The ...
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Journal ArticleAstrophysical Journal · January 10, 2001
High-energy gamma-ray astronomy is now a well-established field, and several sources have been discovered in the region from a few giga-electron volts up to several tera-electron volts. If sources involving hadronic processes exist, the production of photo ...
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Journal ArticleNuclear Physics B - Proceedings Supplements · January 1, 2001
World-wide, several detectors currently running or neaxing completion are sensitive to a core collapse supernova neutrino signal in the Galaxy. I will briefly describe the nature of the neutrino signal and then survey current and future detection technique ...
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Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · 2001
The decay of 16N is used to cross check the absolute energy scale calibration for solar neutrinos established by the electron linear accelerator (LINAC). A deuterium-tritium neutron generator was employed to create 16N via the (n,p) reaction on 16O in the ...
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Journal ArticlePhysical Review D · December 1, 2000
A search for lightly ionizing particles has been performed with the MACRO detector. This search was sensitive to particles with charges between 1/5 e and close to the charge of an electron, with β between approximately 0.25 and 1.0. Unlike previous searche ...
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Journal ArticlePhysical review letters · November 2000
The previously published atmospheric neutrino data did not distinguish whether muon neutrinos were oscillating into tau neutrinos or sterile neutrinos, as both hypotheses fit the data. Using data recorded in 1100 live days of the Super-Kamiokande detector, ...
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Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · October 11, 2000
We describe the construction and performance of a scintillating fiber detector used in the near detector for the K2K (KEK to Kamioka, KEK E362) long baseline neutrino oscillation experiment. The detector uses 3.7 m long and 0.692 mm diameter scintillating ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · April 6, 2000
We present the measurement of two event samples induced by atmospheric v(μ) of average energy Ē(ν) ~ 4 GeV. In the first sample, a neutrino interacts inside the MACRO detector producing an upward-going muon leaving the apparatus. The ratio of the number of ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · 2000
A search for lightly ionizing particles has been performed with the MACRO detector. This search was sensitive to particles with charges between 1/5 e and close to the charge of an electron, with β between approximately 0.25 and 1.0. Unlike previous searche ...
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Journal ArticleNuclear Physics B - Proceedings Supplements · January 1, 2000
Searches for massive penetrating particles in the cosmic radiation have been performed with the MACRO detector. Scintillators, streamer tubes (instrumented with specialized electronics) and nuclear track detectors have been used to search for signatures co ...
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Journal Article · May 11, 1999
In 1998, the Super-Kamiokande announced evidence for the observation of
neutrino oscillations based on measurements of the atmospheric neutrino flux.
This paper presents the updated results for fully and partially-contained
events with 736 days of data, as ...
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Journal ArticleNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · January 21, 1999
In order to calibrate the Super-Kamiokande experiment for solar neutrino measurements, a linear accelerator (LINAC) for electrons was installed at the detector. LINAC data were taken at various positions in the detector volume, tracking the detector respon ...
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Journal ArticleNuclear Physics B - Proceedings Supplements · January 1, 1999
With the aim of discussing the effect of the possible sources of systematic uncertainties in simulation models, the analysis of multiple muon events from the MACRO experiment at Gran Sasso is reviewed. In particular, the predictions from different currentl ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · January 1, 1999
A total of 137 upward stopping muons of minimum energy 1.6 GeV are observed by Super-Kamiokande during 516 detector live days. The measured muon flux is 0.39 ± 0.04(stat.) ± 0.02(syst.) × 10-13 cm-2s-1sr-1 compared to an expected flux of 0.73 ± 0.16(theo.) ...
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Journal ArticlePhysical Review Letters · January 1, 1999
We present results of a search for proton decays, p → ¯νK+, using data from a 33kt?yr exposure of the Super-Kamiokande detector. Two decay modes of the kaon, K+ → µ+νµ and K+ → π+π0, were studied. The data were consistent with the background expected from ...
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Journal ArticlePhysical Review Letters · January 1, 1999
A search for day-night variations in the solar neutrino flux resulting from neutrino oscillations has been carried out using the 504 day sample of solar neutrino data obtained at Super-Kamiokande. The absence of a significant day-night variation has set an ...
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Journal ArticlePhysical Review Letters · January 1, 1999
A measurement of the energy spectrum of recoil electrons from solar neutrino scattering in the Super-Kamiokande detector is presented. The results shown here were obtained from 504 days of data taken between 31 May 1996 and 25 March 1998. The shape of the ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · January 1, 1999
Radioactivity from radon is a major background for observing solar neutrinos at Super-Kamiokande. In this paper, we describe the measurement of radon concentrations at Super-Kamiokande, the method of radon reduction, and the radon monitoring system. The me ...
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Journal ArticlePhysical Review Letters · January 1, 1999
A total of 614 upward throughgoing muons of minimum energy 1.6 GeV are observed by Super-Kamiokande during 537 detector live days. The measured muon flux is [1.74±0.07(stat)±0.02(sys)]×10-13cm-2s-1sr-1 compared to an expected flux of [1.97±0.44(theor)]×10- ...
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Journal ArticleAstroparticle Physics · January 1, 1999
We have measured directly the residual energy of cosmic ray muons crossing the MACRO detector at the Gran Sasso Laboratory. For this measurement we have used a transition radiation detector consisting of three identical modules, each of about 12m2 area, op ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 1999
We perform an indirect search for weakly interacting massive particles (WIMPs) using the MACRO detector to look for neutrino-induced upward-going muons resulting from the annihilation of WIMPs trapped in the Sun and Earth. The search is conducted in variou ...
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Journal ArticlePhysical Review Letters · January 1, 1999
The east-west anisotropy, caused by the deflection of primary cosmic rays in the Earth's magnetic field, is observed for the first time in the flux of atmospheric neutrinos. Using a 45 kt yr exposure of the Super-Kamiokande detector, 552 e-like and 633 μ-l ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 1999
We present a measurement of the underground decoherence function using multi-muon events observed in the MACRO detector at Gran Sasso at an average depth of (Formula presented) Muon pair separations up to 70 m have been measured, corresponding to parent me ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 1999
Using data collected by the MACRO experiment during the years 1989–1996, we show evidence for the shadow of the Moon in the underground cosmic ray flux with a significance of 3.6σ. This detection of the shadowing effect is the first by an underground detec ...
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Journal ArticleAmerican Scientist · January 1, 1999
Always elusive, Fermi's 'little neutral one' turns out to be a quick-change artist as well, offering answers and new questions for physics and cosmocology. ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · September 17, 1998
The flavor ratio of the atmospheric neutrino flux and its zenith angle dependence have been studied in the multi-GeV energy range using an exposure of 25.5 kiloton-years of the Super-Kamiokande detector. By comparing the data to a detailed Monte Carlo simu ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · August 27, 1998
We present a measurement of the flux of neutrino-induced upgoing muons (< Eν > ∼ 100 GeV) using the MACRO detector. The ratio of the number of observed to expected events integrated over all zenith angles is 0.74 ± 0.036 (stat) ± 0.046 (systematic) ± 0.13 ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · August 6, 1998
From an exposure of 25.5 kiloton-years of the Super-Kamiokande detector, 900 muon-like and 983 electron-like single-ring atmospheric neutrino interactions were detected with momentum pe > 100 MeV/c, pμ > 200 MeV/c, and with visible energy less than 1.33 Ge ...
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Journal ArticlePhysical Review Letters · January 1, 1998
The first results of the solar neutrino flux measurement from Super-Kamiokande are presented. The results shown here are obtained from data taken between 31 May 1996, and 23 June 1997. Using our measurement of recoil electrons with energies above 6.5 MeV, ...
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Journal ArticlePhysical Review Letters · January 1, 1998
We present an analysis of atmospheric neutrino data from a 33.0 kton yr (535-day) exposure of the Super-Kamiokande detector. The data exhibit a zenith angle dependent deficit of muon neutrinos which is inconsistent with expectations based on calculations o ...
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Journal ArticleAstroparticle Physics · January 1, 1998
An experimental study of the production of up-going charged particles in inelastic interactions of down-going underground muons is reported, using data obtained from the MACRO detector at the Gran Sasso Laboratory. In a sample of 12.2 x 106 single muons, c ...
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Journal ArticleAstroparticle Physics · January 1, 1998
The MACRO experiment has been running as a supernova neutrino detector since 1989 and is sensitive to the whole galaxy since the beginning of 1992. A galactic supernova would produce some hundreds of v̄e events in the detector. We describe our stellar gravi ...
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Journal ArticlePhysical Review Letters · January 1, 1998
We have searched for proton decay via p→e+π0 using data from a 25.5ktonyr exposure of the Super-Kamiokande detector. We find no candidate events with an expected background induced by atmospheric neutrinos of 0.1 events. From these data, we set a lower lim ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · 1998
From an exposure of 25.5 kiloton-years of the Super-Kamiokande detector, 900 muon-like and 983 electron-like single-ring atmospheric neutrino interactions were detected with momentum pe > 100 MeV/c, pμ > 200 MeV/c, and with visible energy less than 1 ...
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Journal ArticleNuclear Physics B - Proceedings Supplements · January 1, 1998
The MACRO underground detector at Gran Sasso has recorded about 30 million muon events in the period 1989-1995. We have analyzed these data to look for time variations and to study the pointing capabilities of the apparatus in the search for astrophysical ...
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Journal ArticlePhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · August 7, 1997
In this letter we present the results of the search for massive magnetic monopoles in the penetrating cosmic ray radiation using the various subdetectors of the MACRO apparatus, during the period 1989-1995. Flux limits are given for the β = v/c range 4 × 1 ...
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Journal ArticleAstroparticle Physics · January 1, 1997
Using 5.33 × 106 single muons collected in 1.46 × 104 live hours by MACRO during the period 1991-1994, we have searched for a correlation between variations in the underground muon rate, Νμ, and seasonal temperature variations in the atmosphere. These corr ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 1997
In this paper, the first of a two-part work, we present the reconstruction and measurement of muon events detected underground by the MACRO experiment at Gran Sasso [Formula presented] 1.3 TeV in atmosphere). The main aim of this work is to discuss the muo ...
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Journal ArticlePhysical Review D - Particles, Fields, Gravitation and Cosmology · January 1, 1997
Multimuon data from the MACRO experiment at Gran Sasso have been analyzed using a new method, which allows one to estimate the primary cosmic ray fluxes. The estimated all-particle spectrum is higher and flatter than the one obtained from direct measuremen ...
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Journal ArticlePhysics Letters B · September 7, 1995
We report on the first measurement of the flux of upgoing muons resulting from interactions of atmospheric neutrinos in the rock below MACRO. The ratio of the observed to the expected number of events integrated over all nadir angles is 0.73 ± .09stat. ± . ...
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Journal ArticleAstroparticle Physics · January 1, 1995
We describe the techniques chosen to search tor magnetic monopoles using the MACRO streamer tube sub-system. The hardware and the details of the analysis procedures will be discussed also. The results for slowly moving monopoles are reported from a first d ...
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Journal ArticlePhysics Letters B · October 13, 1994
A study of the primary cosmic ray composition in the energy range 5ṡ1014-5ṡ1015 eV is performed through the analysis of the deep underground muons and of the e.m. component of Extensive Air Showers detected in coincidence by the MACRO and EAS-TOP experimen ...
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Journal ArticleNuclear Physics B (Proceedings Supplements) · January 1, 1994
Muon events collected with the streamer tube system of MACRO have been used to study the vertical muon intensity and to search for astrophysical point sources. New upper limits on the muon fluxes coming from source candidates have been obtained. The μ pair ...
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Journal ArticleNuclear Physics, Section B · February 17, 1992
We present a study of the correlations in the arrival times of about 1016 single and multiple muons detected by the first two MACRO supermodules. The time correlations, from milliseconds to several hundrends of seconds, have been analyzed in terms of the r ...
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Journal ArticleNuclear Physics B (Proceedings Supplements) · January 1, 1992
The simultaneous observation of the electromagnetic and TeV muon components of extensive air showers by the EAS-TOP and MACRO detectors, respectively, is described for a period of 100 days in 1990. The two detectors and their combined resolutions are brief ...
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Journal ArticleNuclear Physics B (Proceedings Supplements) · January 1, 1992
The first MACRO lower supermodule has been sensitive to antineutrinos from stellar gravitational collapse since spring 1989. The results with the 44 tonnes of liquid scintillator which have been instrumented to search for stellar gravitational collapse are ...
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Journal ArticleNuclear Physics B (Proceedings Supplements) · January 1, 1991
The MACRO detector is sensitive to any fast or slow highly ionizing massive particles in cosmic rays. These include "nuclearites" or strange quark matter. The negative result of a search lasting about 20 months using 1 12 of the detector has yielded a flux ...
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Journal ArticleNuclear Inst. and Methods in Physics Research, B · April 2, 1990
Gold atoms have been implanted at 1 and 30 keV energies in various substrates. Pulses from a Nd:YAG laser were used to desorb these atoms. Following laser bombardments, PIXE and RBS (Rutherford backscattering) measurements were performed, using the 3 MeV α ...
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Journal ArticleNuclear Inst. and Methods in Physics Research, B · January 2, 1990
Laser desorption has become an important tool for the production of atomic beams of refractory metals and has already been used successfully in laser-spectroscopic studies of Au and Pt isotopes. In the present experiment we have desorbed Au atoms implanted ...
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