https://doi.org/10.1051/epjconf/202225913001
Reactions Governing Strangeness Abundance in Primordial Universe
Department of Physics, The University of Arizona, Tucson, Arizona 85721, USA
Published online: 1 February 2022
Strangness production processes can balance natural strangeness decay in the early hadronic Universe. Comparing to the characteristic Hubble time 1/H, the reaction rates for μ± + νμ → K±, l− + l+ → ϕ, and π+π → K in sequence become slower than expansion rate at T = 33.9 MeV, T = 25MeV and T = 20MeV respectively. This means that in the antibaryon annihilation epoch near to T ≃ 40MeV strangeness is in chemical equilibrium.
© The Authors, published by EDP Sciences, 2022
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