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2022ApJ...927...69A - Astrophys. J., 927, 69-69 (2022/March-1)

A Search for Correlated Low-energy Electron Antineutrinos in KamLAND with Gamma-Ray Bursts.

ABE S., ASAMI 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., 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., EIZUKA M., KURASAWA M., NAKAHATA T., FUTAGI S., WATANABE H., YOSHIDA Y., OBARA S., ICHIKAWA A.K., YOSHIDA S., UMEHARA S., FUSHIMI K., BERGER B.E., FUJIKAWA B.K., LEARNED J.G., MARICIC J., AXANI S.N., SMOLSKY J., LABER-SMITH C., 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., SONG H., O'DONNELL T., DELL'ORO S. (The KamLAND Collaboration)

Abstract (from CDS):

We present the results of a time-coincident event search for low-energy electron antineutrinos in the KamLAND detector with gamma-ray bursts (GRBs) from the Gamma-ray Coordinates Network and Fermi Gamma-ray Burst Monitor. Using a variable coincidence time window of ±500 s plus the duration of each GRB, no statistically significant excess above the background is observed. We place the world's most stringent 90% confidence level upper limit on the electron antineutrino fluence below 17.5 MeV. Assuming a Fermi-Dirac neutrino energy spectrum from the GRB source, we use the available redshift data to constrain the electron antineutrino luminosity and effective temperature.

Journal keyword(s): Gamma-ray bursts - Cosmological neutrinos

Simbad objects: 5

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