Cross section for supernova axion observation in neutrino water Čherenkov detectors
Axions coupled to nucleons might be copiously emitted from core-collapse supernovae (SNe). If the axion-nucleon coupling is strong enough, then axions would be emitted from the SN as a burst and, reaching Earth, may excite the oxygen nuclei in water Čherenkov detectors (O16+a→O∗16). This process will be followed by decay(s) of the excited state resulting in an emission of photons and thus providing a possibility for a direct detection of axions from a galactic SN in large underground neutrino Čherenkov detectors. Motivated by this possibility, we present an updated calculation of axion-oxygen cross section obtained by using self-consistent continuum random-phase approximation. We calculate the branching ratio of the oxygen nucleus deexcitation into γ rays, neutrons, protons, and α particles and also consider photon emission from secondary nuclei to compute a total γ spectrum created when axions excite O16. These results are used to revisit the detectability of axions from SN 1987A in Kamiokande-II.
Item Type | Article |
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Additional information | ©2024 American Physical Society. This is the accepted manuscript version of an article which has been published in final form at https://doi.org/10.1103/PhysRevC.109.015501 |
Keywords | nuclear and high energy physics |
Date Deposited | 15 May 2025 15:24 |
Last Modified | 31 May 2025 00:41 |
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picture_as_pdf - 2306.17055.pdf
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subject - Submitted Version
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