학술논문
KamLAND’s search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube
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article
Author
Abe, S; Asami, S; Eizuka, M; Futagi, S; Gando, A; Gando, Y; Gima, T; Goto, A; Hachiya, T; Hata, K; Hosokawa, K; Ichimura, K; Ieki, S; Ikeda, H; Inoue, K; Ishidoshiro, K; Kamei, Y; Kawada, N; Kishimoto, Y; Kinoshita, T; Koga, M; Kurasawa, M; Maemura, N; Mitsui, T; Miyake, H; Nakahata, T; Nakamura, K; Nakamura, R; Ozaki, H; Sakai, T; Sambonsugi, H; Shimizu, I; Shirai, J; Shiraishi, K; Suzuki, A; Suzuki, Y; Takeuchi, A; Tamae, K; Watanabe, H; Yoshida, Y; Obara, S; Ichikawa, AK; Yoshida, S; Umehara, S; Fushimi, K; Kotera, K; Urano, Y; Berger, BE; Fujikawa, BK; Learned, JG; Maricic, J; Axani, SN; Smolsky, J; Lertprasertpong, J; Winslow, LA; Fu, Z; Ouellet, J; Efremenko, Y; Karwowski, HJ; Markoff, DM; Tornow, W; Li, A; Detwiler, JA; Enomoto, S; Decowski, MP; Grant, C; Song, H; O’Donnell, T; Dell’Oro, S
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Subject
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Abstract
We report the results of a search for MeV-scale astrophysical neutrinos in KamLAND presented as an excess in the number of coincident neutrino interactions associated with the publicly available high-energy neutrino datasets from the IceCube Neutrino Observatory. We find no statistically significant excess in the number of observed low-energy electron antineutrinos in KamLAND, given a coincidence time window of ±500 s, ±1,000 s, ±3,600 s, and ±10,000 s around each of the IceCube neutrinos. We use this observation to present limits from 1.8 MeV to 100 MeV on the electron antineutrino fluence, assuming a mono-energetic flux. We then compare the results to several astrophysical measurements performed by IceCube and place a limit at the 90% confidence level on the electron antineutrino isotropic thermal luminosity from the TXS 0506+056 blazar.