Yukawa and triscalar processes in electroweak baryogenesis
- California Institute of Technology, Pasadena, California 91125 (United States)
We derive the contributions to the quantum transport equations for electroweak baryogenesis due to decays and inverse decays induced by triscalar and Yukawa interactions. In the minimal supersymmetric standard model (MSSM), these contributions give rise to couplings between Higgs and fermion supermultiplet densities, thereby communicating the effects of CP-violation in the Higgs sector to the baryon sector. We show that the decay and inverse decay-induced contributions that arise at zeroth order in the strong coupling, {alpha}{sub s}, can be substantially larger than the O({alpha}{sub s}) terms that are generated by scattering processes and that are usually assumed to dominate. We revisit the often-used approximation of fast Yukawa-induced processes and show that for realistic parameter choices it is not justified. We solve the resulting quantum transport equations numerically with special attention to the impact of Yukawa rates and study the dependence of the baryon-to-entropy ratio Y{sub B} on MSSM parameters.
- OSTI ID:
- 20774836
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 73, Issue 11; Other Information: DOI: 10.1103/PhysRevD.73.115009; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Anatomy of the electroweak phase transition for dark sector induced baryogenesis
Supersymmetric CP violating currents and electroweak baryogenesis