@Article{Camalich_etal2021,
author="Camalich, J. M.
and Terol-Calvo, J.
and Tolos, L.
and Ziegler, R.",
title="Supernova constraints on dark flavored sectors",
journal="Physical Review D",
year="2021",
volume="103",
number="12",
pages="L121301 - 7pp",
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 Lambda hyperons, we calculate the cooling of the star induced by the emission of dark particles X-0 through the decay Lambda -> nX(0). 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(Lambda -> nX(0)) <= 8 x 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.",
optnote="WOS:000661796900010",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4874), last updated on Sat, 10 Jul 2021 12:47:44 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.103.L121301",
opturl="https://arxiv.org/abs/2012.11632",
opturl="https://doi.org/10.1103/PhysRevD.103.L121301"
}