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arXiv · 2211.13760

Proto-neutron stars as cosmic factories for massive axion-like-particles

Alessandro Lella·Pierluca Carenza·Giuseppe Lucente·Maurizio Giannotti·Alessandro Mirizzi
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Abstract

The parameter space of massive axion-like-particles (ALPs) with $m_a \sim {\mathcal O} (100)$ MeV and coupled with nucleons is largely unexplored. Here, we present new constraints in this parameter region. In doing so, we characterize the supernova emissivity of heavy ALPs from a proto-neutron star, including for the first time mass effects in both nucleon-nucleon Bremsstrahlung and pionic Compton processes. In addition, we highlight novel possibilities to probe the couplings with photons and leptons from supernova ALP decays.

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Alessandro Lella, Pierluca Carenza, Giuseppe Lucente, Maurizio Giannotti, Alessandro Mirizzi. 2023-05-06. Proto-neutron stars as cosmic factories for massive axion-like-particles. https://doi.org/10.1103/physrevd.107.103017

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