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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Subjects | Physics and Astronomy(all) > Nuclear and High Energy Physics |
Date Deposited | 26 Jul 2024 15:22 |
Last Modified | 26 Jul 2024 15:22 |
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Read more research from the creator(s):
- Carenza, Pierluca
- Co', Giampaolo
- Giannotti, Maurizio
- Lella, Alessandro
- Lucente, Giuseppe
- Mirizzi, Alessandro
- Rauscher, Thomas
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- School of Physics, Engineering & Computer Science
- Centre for Astrophysics Research
- Department of Physics, Astronomy and Mathematics
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