Search for Solar Flare Neutrinos with the KamLAND Detector

Journal Article · 16 January 2022 · The Astrophysical Journal

DOI: https://doi.org/10.3847/1538-4357/ac35d1 · OSTI ID:1840624

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

Abstract We report the result of a search for neutrinos in coincidence with solar flares from the GOES flare database. The search was performed on a 10.8 kton-year exposure of KamLAND collected from 2002 to 2019. This large exposure allows us to explore previously unconstrained parameter space for solar flare neutrinos. We found no statistical excess of neutrinos and established 90% confidence level upper limits of 8.4 × 10 ⁷ cm ⁻² (3.0 × 10 ⁹ cm ⁻² ) on the electron antineutrino (electron neutrino) fluence at 20 MeV normalized to the X12 flare, assuming that the neutrino fluence is proportional to the X-ray intensity.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1840624
• Journal Information: The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 2 Vol. 924; ISSN 0004-637X
• Publisher: American Astronomical SocietyCopyright Statement
• Country of Publication: United States
• Language: English