A study of extraterrestrial antineutrino sources with the KamLAND detector
Description
We present the results of a search for extraterrestrial electron antineutrinos ({bar {nu}}{sub e}'s) in the energy range 8.3 MeV < E{sub {bar {nu}}}{sub e} < 30.8 MeV 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 {sup 8}B solar {nu}{sub e}'s converting into {bar {nu}}{sub e}'s at 5.3 x 10{sup -5} (90% C.L.). The present data also allows us to set more stringent limits on the diffuse supernova … continued below
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Collaboration, The KamLAND; Gando, A.; Gando, Y.; Ichimura, K.; Ikeda, H.; Inoue, K. et al. May 18, 2011.
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- Collaboration, The KamLAND
- Gando, A.
- Gando, Y.
- Ichimura, K.
- Ikeda, H.
- Inoue, K.
- Kibe, Y.
- Kishimoto, Y.
- Koga, M.
- Minekawa, Y.
- Mitsui, T.
- Morikawa, T.
- Nagai, N.
- Nakajima, K.
- Nakamura, K.
- Narita, K.
- Shimizu, I.
- Shimizu, Y.
- Shirai, J.
- Suekane, F.
- Suzuki, A.
- Takahashi, H.
- Takahashi, N.
- Takemoto, Y.
- Tamae, K.
- Watanabe, H.
- Xu, B. D.
- Yabumoto, H.
- Yoshida, H.
- Yoshida, S.
- Enomoto, S.
- Kozlov, A.
- Murayama, H.
- Grant, C.
- Keefer, G.
- Piepke, A.
- Banks, T. I.
- Bloxham, T.
- Detwiler, J. A.
- Freedman, S. J.
- Fujikawa, B. K.
- Han, K.
- Kadel, R.
- O'Donnell, T.
- Steiner, H. M.
- Dwyer, D. A.
- McKeown, R. D.
- Zhang, C.
- Berger, B. E.
- Lane, C. E.
- Maricic, J.
- Miletic, T.
- Batygov, M.
- Learned, J. G.
- Matsuno, S.
- Sakai, M.
- Horton-Smith, G. A.
- Downum, K. E.
- Gratta, G.
- Efremenko, Y.
- Kamyshkov, Y.
- Perevozchikov, O.
- Karwowski, H. J.
- Markoff, D. M.
- Tornow, W.
- Heeger, K. M.
- Decowski, M. P.
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Lawrence Berkeley National Laboratory
Publisher Info: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States)Place of Publication: Berkeley, California
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Description
We present the results of a search for extraterrestrial electron antineutrinos ({bar {nu}}{sub e}'s) in the energy range 8.3 MeV < E{sub {bar {nu}}}{sub e} < 30.8 MeV 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 {sup 8}B solar {nu}{sub e}'s converting into {bar {nu}}{sub e}'s at 5.3 x 10{sup -5} (90% C.L.). 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.
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Keywords
- Annihilation
- Antineutrinos
- Electron Antineutrinos
- Energy Range
- Neutral Currents
- Neutrinos
- Nonluminous Matter
- Probability
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- Journal Name: The Astrophysical Journal
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- Report No.: LBNL-4610E
- Grant Number: DE-AC02-05CH11231
- Office of Scientific & Technical Information Report Number: 1017073
- Archival Resource Key: ark:/67531/metadc841387
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- May 18, 2011
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- May 19, 2016, 3:16 p.m.
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Collaboration, The KamLAND; Gando, A.; Gando, Y.; Ichimura, K.; Ikeda, H.; Inoue, K. et al. A study of extraterrestrial antineutrino sources with the KamLAND detector, article, May 18, 2011; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc841387/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.