2021/07/31 by Giuseppe Lucente, Pierluca Carenza · 2 citations
Physics and Astronomy · #Astrophysics #Atomic physics #Axion #Bremsstrahlung #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Degenerate energy levels #Electron #Emissivity #Materials science #Nuclear physics #Particle physics theoretical and experimental studies #Physics #Positron #Proton #Quantum mechanics #Range (aeronautics) #Supernova #astro-ph.HE #hep-ph
paper · pdf · doi:10.1103/physrevd.104.103007
published as Phys. Rev. D 104, 103007 (2021) · 12 pages, 12 figures. Minor changes to match the version published on PRD
openalex publication_date 2021/11/08 · arxiv created 2021/11/13 · arxiv updated 2021/11/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Axionlike particles (ALPs) coupled with electrons would be produced in a supernova (SN) via electron-proton bremsstrahlung and electron-positron fusion. We evaluate the ALP emissivity from these processes by taking into account the ALP mass and thermal effects on electrons in the strongly degenerate and relativistic SN plasma. Using a state-of-the-art SN simulation, we evaluate the SN 1987A cooling bound on ALPs for masses in the range 1--200 MeV, which excludes currently unprobed regions down to gae\ensuremath∼2.5\ifmmode×\else\texttimes\fi10^\ensuremath-10 at ma\ensuremath∼120 MeV.