Paper information
- Authors:: Jorge Martin Camalich, Jorge Terol-Calvo, Laura Tolos, Robert Ziegler
- ArXiv e-Print: 2012.11632
- Journal: Phys. Rev. D 103, 121301 (2021)
- DOI: https://doi.org/10.1103/PhysRevD.103.L121301
Abstract
Proto-neutron stars forming a few seconds after core-collapse supernovae are hot and dense environments where hyperons can be efficiently produced by weak processes. By making use of various state-of-the-art supernova simulations combined with the proper extensions of the equations of state including Λ hyperons, we calculate the cooling of the star induced by the emission of dark bosons X0 through the decay Λ→nX0. Comparing this novel energy-loss process to the neutrino cooling of SN 1987A allows us to set stringent constraints on massless dark photons and axions with flavor-violating couplings to quarks. We find that this new supernova bound can be orders of magnitude stronger than other limits in dark-sector models.