Ponente
Descripción
Axion-like particles (ALPs) can be copiously produced in core-collapse supernovae (SN) due to their coupling to SN matter. If they are weakly coupled, ALPs leave the star unimpeded after being produced. This regime has already been tightly constrained by cooling bounds. In this talk, I will focus on the trapping regime, where the SN environment becomes optically thick for ALPs and, therefore, they cannot free-stream out of the star and become trapped. Even in this regime, a vast flux of ALPs can escape and arrive to Earth. In particular, I will consider MeV ALPs that are produced in the SN interior through their coupling to nucleons and escape with semi-relativistic velocities. I will analyse the diffuse galactic SN flux of ALPs formed by the overlap of ALP fluxes from different SN and its possible detection in neutrino experiments.
