Abstract
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 at .
5 More- Received 2 August 2021
- Accepted 15 October 2021
DOI:https://doi.org/10.1103/PhysRevD.104.103007
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society