paper

Getting the most on supernova axions

arXiv:2306.01048 · doi:10.1103/PhysRevD.109.023001

Abstract

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 ALP-nucleon coupling for ALP masses . Remarkably, in the case of canonical QCD axion models, the SN bounds exclude all values of . This result prevents the possibility for current and future cosmological surveys to detect any signatures due to hot dark matter QCD axion mass.

arXiv comment15 pages, 7 figures. Matches the version published on PRD. Changes: we employed a different benchmark SN model with respect to the previous version, accounting for a 1D treatment of convection. We added a new section to discuss the uncertainties on the SN bounds. We added an additional section to analyze SN bounds on canonical QCD axion models

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