ConferenceProceedings of Science · September 27, 2024
This contribution reports the results of the searches for high-energy astrophysical neutrino point sources in the energy range above GeV using Super-Kamiokande data. The searches include time-integrated and time-dependent full sky searches for both νμ ...
Cite
ConferenceProceedings of Science · September 27, 2024
Super-Kamiokande (SK) experiment started the "SK-Gd experiment" by dissolving gadolinium (Gd) sulfate octa-hydrate in ultra-pure water from the tank in July 2020. The neutron tagging efficiency has been improved compared to the pure-water phase by detectin ...
Cite
ConferenceProceedings of Science · September 27, 2024
Neutrinos and muons from cosmic-ray interactions in the atmosphere originate from mesons, such as pions and kaons, in air-showers. An accuracy of the absolute atmospheric neutrino flux and its flavor ratio are limited due to the uncertainty of meson produc ...
Cite
ConferenceProceedings of Science · September 27, 2024
In 2020, a new phase of Super-Kamiokande experiment, SK-Gd, was started by loading gadolinium into the pure water. This led to a high neutron detection efficiency, which allows us to distinguish different neutrino reactions, enhance signals and remove back ...
Cite
ConferenceProceedings of Science · September 27, 2024
The atmospheric neutrino-oxygen neutral-current quasielasatic (NCQE) reactions are one of the main background in the search for supernova relic neutrinos. Here, we report the first measurement of the atmospheric neutrino-oxygen NCQE cross section in the Su ...
Cite
ConferenceProceedings of Science · September 27, 2024
Cosmic-ray muons are generated from the decay of mesons which are secondary particles produced via hadronic interaction between primary cosmic-ray particles and atmospheric nuclei at the upper the atmosphere. The mesons such pions and kaons mostly decay in ...
Cite
ConferenceProceedings of Science · September 27, 2024
Super-Kamiokande is a large water Cherenkov detector located approximately 1,000 m underground in Kamioka, Japan. The detector is a cylindrical tank 39.3 m in diameter and 41.4 m high, filled with about 50 kton of gadolinium loaded water. We measured ...
Cite
ConferenceProceedings of Science · September 27, 2024
Since 2020, Super-Kamiokande (SK) detector has been updated by loading gadolinium (Gd) as a new experimental phase, ‘SK-Gd.’ In the SK-Gd experiment, we can search low-energy electron antineutrinos via inverse-beta decay with efficient neutron identificati ...
Cite
ConferenceProceedings of Science · September 27, 2024
Despite efforts from numerous experiments to grasp the nature of dark matter, no convincing dark matter signal has been observed so far and the very properties of this invisible matter remain unknown. Nevertheless, strong constraints on these properties ar ...
Cite
ConferenceProceedings of SPIE the International Society for Optical Engineering · January 1, 2024
The Vera C. Rubin Observatory is an integrated survey system, currently under construction in Chile, to accomplish a 10-year optical survey of the southern sky. The 8.4-meter Simonyi Survey Telescope mount is nearing completion and undergoing final verific ...
Full textCite
ConferenceProceedings of SPIE the International Society for Optical Engineering · January 1, 2024
The Vera C. Rubin Observatory is nearing completion, and we are embarking on a campaign to optimize the image quality during its upcoming 10-year optical survey. Here, we present the tools and methods we are implementing to disentangle and quantify the dif ...
Full textCite
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 ...
Cite
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 dete ...
Cite
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 ...
Cite
ConferenceProceedings of SPIE the International Society for Optical Engineering · January 1, 2022
The Rubin Observatory Commissioning Camera (ComCam) is a scaled down (144 Megapixel) version of the 3.2 Gigapixel LSSTCam which will start the Legacy Survey of Space and Time (LSST), currently scheduled to start in 2024. The purpose of the ComCam is to ver ...
Full textCite
ConferenceProceedings of SPIE the International Society for Optical Engineering · January 1, 2016
We employ electrostatic conversion drift calculations to match CCD pixel signal covariances observed in at field exposures acquired using candidate sensor devices for the LSST Camera.1, 2 We thus constrain pixel geometry distortions present at t ...
Full textCite
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 ...
Cite
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 ...
Cite
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 ...
Cite
ConferenceAip Conference Proceedings · October 14, 2004
As the precision of neutrino oscillation experiments increases, correctly modeling neutrino-nucleus interactions is becoming ever more important. Uncertainties in nuclear form factors and nuclear structure result in uncertainties in determining oscillation ...
Full textCite
https://orcid.org/0000-0003-2035-2380