Axion-like particles from Supernovae

by Alessandro Lella (INFN, Bari)

Thursday 25 Jan 2024, 15:00 → 16:30 Europe/Berlin

seminar room 3 (bldg. 1b)

Core-collapse Supernovae (SNe) are among the most powerful sources of feebly-interacting particles. In particular, the dramatic conditions of temperature and density reached after the collapse make the SN core a unique environment to have a significant production of novel exotic particles, such as axions and axion-like particles (ALPs).  In this seminar I will discuss how axions and ALPs can be produced in a SN core by means of their nuclear couplings. Then, I will show how the ALP parameter space can be severely constrained by employing observations of the neutrino burst from SN 1987A. Moreover, couplings to photons and leptons provide SN ALPs with a vast phenomenology leading to observable signatures of new physics. Therefore, different astrophysical observations can be employed to induce stringent constraints on the different possible scenarios