MSSM electroweak baryogenesis and flavour mixing in transport equations

We make use of the formalism of [T. Konstandin, et al., hep-ph/0410135], and calculate the chargino-mediated baryogenesis in the Minimal Supersymmetric Standard Model. The formalism makes use of a gradient expansion of the Kadanoff–Baym equations for mixing fermions. For illustrative purposes, we fi...

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Bibliographic Details
Published in:Nuclear physics. B 2006-03, Vol.738 (1), p.1-22
Main Authors: Konstandin, Thomas, Prokopec, Tomislav, Schmidt, Michael G., Seco, Marcos
Format: Article
Language:English
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Summary:We make use of the formalism of [T. Konstandin, et al., hep-ph/0410135], and calculate the chargino-mediated baryogenesis in the Minimal Supersymmetric Standard Model. The formalism makes use of a gradient expansion of the Kadanoff–Baym equations for mixing fermions. For illustrative purposes, we first discuss the semiclassical transport equations for mixing bosons in a space–time-dependent Higgs background. To calculate the baryon asymmetry, we solve a standard set of diffusion equations, according to which the chargino asymmetry is transported to the top sector, where it biases sphaleron transitions. At the end we make a qualitative and quantitative comparison of our results with the existing work. We find that the production of the baryon asymmetry of the universe by CP-violating currents in the chargino sector is strongly constrained by measurements of electric dipole moments.
ISSN:0550-3213
1873-1562
DOI:10.1016/j.nuclphysb.2005.11.028