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Search for extraterrestrial antineutrino sources with the KamLAND detector

Publication ,  Journal Article
Gando, A; Gando, Y; Ichimura, K; Ikeda, H; Inoue, K; Kibe, Y; Kishimoto, Y; Koga, M; Minekawa, Y; Mitsui, T; Morikawa, T; Nagai, N; Narita, K ...
Published in: Astrophysical Journal
February 1, 2012

We present the results of a search for extraterrestrial electron antineutrinos (?e's) in the energy range 8.3MeV < E?e < 31.8MeV using the KamLAND detector. In an exposure of 4.53 kton-year, we identify 25 candidate events. All of the candidate events can be attributed to background, most importantly neutral current atmospheric neutrino interactions, setting an upper limit on the probability of 8B solar ?es converting into ?es at 5.3×10?5 (90% CL), if we assume an undistorted ?e shape. This limit corresponds to a solar ?e flux of 93 cm?2 s?1 or an event rate of 1.6 events (kton-year)?1 above the energy threshold (E? ≥ 8.3MeV). The present data also allows us to set more stringent limits on the diffuse supernova neutrino flux and on the annihilation rates for light dark matter particles. © 2012. The American Astronomical Society. All rights reserved.

Duke Scholars

Published In

Astrophysical Journal

DOI

EISSN

1538-4357

ISSN

0004-637X

Publication Date

February 1, 2012

Volume

745

Issue

2

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0306 Physical Chemistry (incl. Structural)
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

Citation

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Gando, A., Gando, Y., Ichimura, K., Ikeda, H., Inoue, K., Kibe, Y., … Decowski, M. P. (2012). Search for extraterrestrial antineutrino sources with the KamLAND detector. Astrophysical Journal, 745(2). https://doi.org/10.1088/0004-637X/745/2/193
Journal cover image

Published In

Astrophysical Journal

DOI

EISSN

1538-4357

ISSN

0004-637X

Publication Date

February 1, 2012

Volume

745

Issue

2

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0306 Physical Chemistry (incl. Structural)
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences