Getting the most on supernova axions

Alessandro Lella, Pierluca Carenza, Giampaolo Co', Giuseppe Lucente, Maurizio Giannotti, Alessandro Mirizzi, Thomas Rauscher

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Axion-like particles (ALPs) coupled to nucleons might be copiously emitted from a supernova (SN) core. We extend existing bounds on free-streaming ALPs to the case in which these are so strongly-interacting with the nuclear matter to be trapped in the SN core. For strongly-interacting ALPs, we also extend the bound from the absence of an ALP-induced signal in Kamiokande-II neutrino detector at the time of SN 1987A. We find that combining the different arguments, SNe exclude values of axion-nucleon coupling $g_{aN}\gtrsim10^{-9}$ for ALP masses $m_{a}\lesssim1$ MeV. Remarkably, in the case of canonical QCD axion models, the SN bounds exclude all values of $m_{a}\gtrsim 10^{-2}$ eV. This result prevents the possibility for current and future cosmological surveys to detect any axion signal.
Original languageEnglish
JournalPhysical Review Letters
Publication statusAccepted/In press - 1 Jun 2023


  • hep-ph
  • astro-ph.HE


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