Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-08-21
Mod.Phys.Lett. A11 (1996) 2481-2488
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, Latex, figures available upon request
Scientific paper
Baryogenesis at the electroweak scale depends on divers but identifiable details of bubble wall dynamics and the particle physics. We show that inclusion of the dynamics of relative phase in two-Higgs-doublet model (2HDM) enhances the adiabatic order of the mechanism proposed by McLerran-Shaposhnikov-Turok-Voloshin where the scalar-scalar-vector triangle diagram with top quark in the loop gives rise to a significant contribution to the effective chemical potential biasing the Chern-Simons number. We also show that in 2HDM with less stringent constraints on Yukawa couplings than those imposed by natural flavour conservation, there are additional diagrams contributing to the effective chemical potential. These two effects can combine with several others to produce adequate baryon asymmetry at the electroweak scale.
Duari Susmita Bhowmik
Yajnik Urjit A.
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