TY  - JOUR
AU  - Camalich, J. M.
AU  - Terol-Calvo, J.
AU  - Tolos, L.
AU  - Ziegler, R.
PY  - 2021
DA  - 2021//
TI  - Supernova constraints on dark flavored sectors
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - L121301 - 7pp
VL  - 103
IS  - 12
AB  - 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.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2012.11632
UR  - https://doi.org/10.1103/PhysRevD.103.L121301
DO  - 10.1103/PhysRevD.103.L121301
N1  - WOS:000661796900010
ID  - Camalich_etal2021
ER  -