Protoneutron stars as cosmic factories for massive axionlike particles
Alessandro Lella, Pierluca Carenza, Giuseppe Lucente, Maurizio Giannotti, Alessandro Mirizzi
Abstract
The parameter space of massive axionlike particles (ALPs) with ${m}_{a}\ensuremath{\sim}\mathcal{O}(100)\text{ }\text{ }\mathrm{MeV}$ 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 protoneutron 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.
Topics & Concepts
PhysicsSupernovaNucleonAxionBremsstrahlungNeutron starNuclear physicsParticle physicsPhotonLeptonAstrophysicsStarsCOSMIC cancer databaseCosmic rayNeutronParameter spacePhotofissionDark matterElectronMathematicsStatisticsQuantum mechanicsDark Matter and Cosmic PhenomenaCosmology and Gravitation TheoriesParticle physics theoretical and experimental studies