EPJ Web Conf.
Volume 259, 2022The 19th International Conference of Strangeness in Quark Matter (SQM 2021)
|Number of page(s)||4|
|Section||Open and New (Parallel)|
|Published online||01 February 2022|
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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