Supernova Constraints on Dark Flavored Sectors
نویسندگان
چکیده
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 equations state including $\Lambda$ hyperons, we calculate cooling star induced emission dark particles $X^0$ through decay $\Lambda\to n X^0$. Comparing this novel energy-loss process to neutrino SN 1987A allows us set stringent upper limit on branching fraction, BR$(\Lambda\to X^0)\leq 8\times10^{-9}$, that apply massless photons axions flavor-violating couplings quarks. We find new bound orders magnitude stronger than other limits in dark-sector models.
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2021
ISSN: ['1742-6588', '1742-6596']
DOI: https://doi.org/10.1088/1742-6596/2156/1/012056