6533b82cfe1ef96bd128f787
RESEARCH PRODUCT
Supersymmetric electroweak baryogenesis
Nuria RiusVeronica Sanzsubject
PhysicsPhase transitionParticle physicsNuclear and High Energy Physicsmedia_common.quotation_subjectHigh Energy Physics::PhenomenologyElectroweak interactionFOS: Physical sciencesFísicaAsymmetryAtomic and Molecular Physics and OpticsBaryogenesisHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Baryon asymmetryHiggs bosonHigh Energy Physics::ExperimentHiggsinoMinimal Supersymmetric Standard Modelmedia_commondescription
We calculate the baryon asymmetry generated at the electroweak phase transition in the minimal supersymmetric standard model, using a new method to compute the CP-violating asymmetry in the Higgsino flux reflected into the unbroken phase. The method is based on a Higgs insertion expansion. We find that the CP asymmetry at leading order is proportional to the change in $\tan \beta$ in the bubble wall, which is at most of order $10^{-2}$, while at next-to-leading order this suppression factor disappears. This result may enhance the final baryon asymmetry generated during the electroweak phase transition for small $\Delta \beta (< 10^{-3}$).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-07-22 | Nuclear Physics B - Proceedings Supplements |