Axion emission and detection from a Galactic supernova
Pierluca Carenza (Univ. Bari), Giampaolo Co' (Univ. Salento, Lecce),, Tobias Fischer (Wroclaw Univ.), Maurizio Giannotti (Barry Univ., Miami),, Alessandro Mirizzi (Bari Univ. & INFN Bari), Thomas Rauscher (Basel Univ. &, Hertfordshire Univ., Hatfield)
TL;DR
This paper explores the potential detection of axions emitted from a Galactic supernova using a large water Cherenkov detector, focusing on absorption on oxygen nuclei and resulting gamma signals.
Contribution
It provides a detailed calculation of the supernova axion signal and assesses its detectability in the Hyper-Kamiokande detector.
Findings
Supernova axion signals could be detectable in Hyper-Kamiokande.
Oxygen absorption is a promising detection channel for supernova axions.
Gamma signals from oxygen de-excitation are key to identifying axions.
Abstract
A Galactic supernova (SN) axion signal would be detected in a future neutrino Mton-class water Cherenkov detector, such as the proposed Hyper-Kamiokande in Japan. The main detection channel for axions is absorption on the oxygen nuclei in the water. The subsequent oxygen de-excitation leads to a potentially detectable gamma signal. In this contribution we present a calculation of the SN axion signal and discuss its detectability in Hyper-Kamiokande.
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