2024/03/18 by Sabyasachi Chakraborty, Aritra Gupta, Chakraborty, Sabyasachi +3
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmology and Gravitation Theories #FOS: Physical sciences #Gamma-ray bursts and supernovae #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Phenomenology (hep-ph)
paper · pdf · doi:10.48550/arxiv.2403.12169
openalex publication_date 2024/03/18 · openalex created_date 2024/03/21 · openalex updated_date 2026/07/28
Compact stellar objects like supernovae and neutron stars are believed to cool by emitting axions predominantly via axion bremsstrahlung (NN → NNa), pion conversion (π- p+ → N a) and photo-production (γN → N a). In this paper, we study in detail the photo-production channel, from the unavoidable anomaly induced Wess-Zumino-Witten term ∝ εμναβ Fμν ∂αa ωβ in conjunction with the low energy pion photo-production data. We found that for heavier axions, i.e., ma\simO(100) MeV, photo-production processes can be dominant compared to the usual axion emission processes. In addition, the spectrum of axions emitted in the process is significantly harder than those originating from bremsstrahlung.