Supernova constraints on dark flavored sectors
Peer reviewed, Journal article
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Date
2021-06Metadata
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Original version
Camalich, J.M., Terol-Calvo, J., Tolos Riguiero, L., Ziegler, R. (2021) Supernova constraints on dark flavored sectors. Physical Review D, 103 (12), 1-7. 10.1103/PhysRevD.103.L121301Abstract
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 particles X0 through the decay Λ → nX0. Comparing this novel energy-loss process to the neutrino cooling of SN 1987A allows us to set a stringent upper limit on the branching fraction, BR(Λ → nX0 ) ≤ 8 × 10−9, that we apply to massless dark photons and axions with flavor-violating couplings to quarks. We find that the new supernova bound can be orders of magnitude stronger than other limits in dark-sector models.