Lepton-mediated electroweak baryogenesis
- University of Wisconsin, Madison, Wisconsin, 53706-1390 (United States)
- California Institute of Technology, Pasadena, California 91125 (United States)
We investigate the impact of the tau and bottom Yukawa couplings on the transport dynamics for electroweak baryogenesis in supersymmetric extensions of the standard model. Although it has generally been assumed in the literature that all Yukawa interactions except those involving the top quark are negligible, we find that the tau and bottom Yukawa interaction rates are too fast to be neglected. We identify an illustrative 'lepton-mediated electroweak baryogenesis' scenario in which the baryon asymmetry is induced mainly through the presence of a left-handed leptonic charge. We derive analytic formulas for the computation of the baryon asymmetry that, in light of these effects, are qualitatively different from those in the established literature. In this scenario, for fixed CP-violating phases, the baryon asymmetry has opposite sign compared to that calculated using established formulas.
- OSTI ID:
- 21409373
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevD.81.063506; (c) 2010 The American Physical Society; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ASYMMETRY
BARYONS
CALCULATION METHODS
COUPLING
CP INVARIANCE
INTERACTIONS
LEPTONS
STANDARD MODEL
SUPERSYMMETRY
T QUARKS
TAU PARTICLES
WEINBERG-SALAM GAUGE MODEL
YUKAWA POTENTIAL
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
HEAVY LEPTONS
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
NUCLEAR POTENTIAL
PARTICLE MODELS
POSTULATED PARTICLES
POTENTIALS
QUANTUM FIELD THEORY
QUARKS
SYMMETRY
TOP PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES