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Equilibrium flavor dynamics during the cosmic confinement transition
Author(s) -
Kämpfer B.
Publication year - 1989
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113100309
Subject(s) - physics , baryon , strangeness , particle physics , strange quark , lepton , hadron , thermal equilibrium , baryon number , quark , nuclear physics , thermodynamics , electron
The dynamics of the flavor composition of strongly interacting matter during the cosmic confinement transition is followed in a simplified thermodynamical model. Relying on thermal, mechanical, and chemical equilibrium we analyse the strangeness fraction of strongly interacting matter. Due to equilibrium with respect to Δ S = 0 and Δ S = 1 weak interactions the relations between different flavors depend strongly on the poorly known lepton excess. In a universe where the lepton (antilepton) excess is in the same order of magnitude as the baryon excess, the strange quark abundances are suppressed (enhanced). In the hadron phase the strange baryons carry up to a half of the baryon excess.