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Sources for Electroweak Baryogenesis

Authors
  • Kainulainen, K
Publication Date
Feb 25, 2000
Identifiers
DOI: 10.1142/9789812792129_0060
OAI: oai:cds.cern.ch:428565
Source
CERN Document Server
Keywords
Language
English
License
Unknown
External links

Abstract

I review a computation of the baryon asymmetry arising from a first orderelectroweak phase transition in the Minimal Supersymmetric Standard model byclassical force mechanism (CFM). I focus on CP violation provided by thecharginos and show that it is the usually neglected sum of the two Higgsinofields, H_1+H_2, which gives a larger contribution to the baryon asymmetry thandoes the combination H_1-H_2. In fact, the latter contribution is exactly zeroin CFM, because it is associated with a phase transformation of the fields.Baryogenesis is found to be most effective in MSSM CFM when only $\tilde t_R$is light, which lends independent support for the "light stop scenario", and itremains viable for CP-violating phases as small as \delta_\mu \sim {\it few}\times 10^{-3}.

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