KamLAND's search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube

S. Abe; S. Asami; M. Eizuka; S. Futagi; A. Gando; Y. Gando; T. Gima; A. Goto; T. Hachiya; K. Hata; K. Hosokawa; K. Ichimura; S. Ieki; H. Ikeda; K. Inoue; K. Ishidoshiro; Y. Kamei; N. Kawada; Y. Kishimoto; T. Kinoshita; M. Koga; M. Kurasawa; N. Maemura; T. Mitsui; H. Miyake; T. Nakahata; K. Nakamura; R. Nakamura; H. Ozaki; T. Sakai; H. Sambonsugi; I. Shimizu; J. Shirai; K. Shiraishi; A. Suzuki; Y. Suzuki; A. Takeuchi; K. Tamae; H. Watanabe; Y. Yoshida; S. Obara; A. K. Ichikawa; S. Yoshida; S. Umehara; K. Fushimi; K. Kotera; Y. Urano; B. E. Berger; B. K. Fujikawa; J. G. Learned; J. Maricic; S. N. Axani; J. Smolsky; J. Lertprasertpong; L. A. Winslow; Z. Fu; J. Ouellet; Y. Efremenko; H. J. Karwowski; D. M. Markoff; W. Tornow; A. Li; J. A. Detwiler; S. Enomoto; M. P. Decowski; C. Grant; H. Song; T. O'Donnell; S. Dell'Oro

doi:10.1016/j.astropartphys.2022.102758

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arXiv · 2202.07345

KamLAND's search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube

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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 $\pm$500s, $\pm$1,000s, $\pm$3,600s, and $\pm$10,000s 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.

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S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. Koga, M. Kurasawa, N. Maemura, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, J. Smolsky, J. Lertprasertpong, L. A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, H. Song, T. O'Donnell, S. Dell'Oro. 2022-02-15. KamLAND's search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube. https://doi.org/10.1016/j.astropartphys.2022.102758

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