Why there is something rather than nothing: Matter from weak interactions

Details Why there is something rather than nothing: Matter from weak interactions Why there is something rather than nothing: Matter from weak interactions

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nuphb.373..453n&link_type=abstract

Nuclear Physics B, Volume 373, Issue 2, p. 453-478.

Physics

Nuclear Physics

142

Scientific paper

We show how the baryon number of the universe may be created by anomalous weak interactions during a first-order weak phase transition, in both conventional two-Higgs doublet models and in the supersymmetric standard model. The process we analyze involves non-equilibrium charge transport during the phase transition. Given current estimates of anomalous baryon violation rates, the models we examine are capable of producing a baryon-to-entropy ratio as large as ρB/s ⋍ 10-6 for maximal CP violation and optimal phase transition characteristic - many orders of magnitude larger than found with previously proposed mechanisms. Thus the observed value ρB/s ⋍ 10-10 can be easily explained by weak interaction physics in a manner that may eventually be experimentally verifiable.

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