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.

Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., et al. (2022). KamLAND's search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube. ASTROPARTICLE PHYSICS, 143(October 2022) [10.1016/j.astropartphys.2022.102758].

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

Dell'Oro S.
2022

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.
Articolo in rivista - Articolo scientifico
Astrophysical neutrinos; Neutrinos;
English
21-lug-2022
2022
143
October 2022
102758
none
Abe, S., Asami, S., Eizuka, M., Futagi, S., Gando, A., Gando, Y., et al. (2022). KamLAND's search for correlated low-energy electron antineutrinos with astrophysical neutrinos from IceCube. ASTROPARTICLE PHYSICS, 143(October 2022) [10.1016/j.astropartphys.2022.102758].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/472461
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