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arXiv · 2308.15849

Shedding light on neutrino self-interactions with solar antineutrino searches

Quan-feng Wu·Xun-Jie Xu
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Abstract

Solar antineutrinos are absent in the standard solar model prediction. Consequently, solar antineutrino searches emerge as a powerful tool to probe new physics capable of converting neutrinos into antineutrinos. In this study, we highlight that neutrino self-interactions, recently gaining considerable attention due to their cosmological and astrophysical implications, can lead to significant solar antineutrino production. We systematically explore various types of four-fermion effective operators and light scalar mediators for neutrino self-interactions. By estimating the energy spectra and event rates of solar antineutrinos at prospective neutrino detectors such as JUNO, Hyper-Kamiokande, and THEIA, we reveal that solar antineutrino searches can impose stringent constraints on neutrino self-interactions and probe the parameter space favored by the Hubble tension.

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Quan-feng Wu, Xun-Jie Xu. 2023-08-30. Shedding light on neutrino self-interactions with solar antineutrino searches. https://doi.org/10.1088/1475-7516%2F2024%2F02%2F037

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