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Title: Lepton-mediated electroweak baryogenesis

Abstract

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.

Authors:
;  [1];  [1];  [2]
  1. University of Wisconsin, Madison, Wisconsin, 53706-1390 (United States)
  2. California Institute of Technology, Pasadena, California 91125 (United States)
Publication Date:
OSTI Identifier:
21409373
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 81; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.81.063506; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 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

Citation Formats

Chung, Daniel J. H., Garbrecht, Bjorn, Ramsey-Musolf, Michael J, California Institute of Technology, Pasadena, California 91125, and Tulin, Sean. Lepton-mediated electroweak baryogenesis. United States: N. p., 2010. Web. doi:10.1103/PHYSREVD.81.063506.
Chung, Daniel J. H., Garbrecht, Bjorn, Ramsey-Musolf, Michael J, California Institute of Technology, Pasadena, California 91125, & Tulin, Sean. Lepton-mediated electroweak baryogenesis. United States. https://doi.org/10.1103/PHYSREVD.81.063506
Chung, Daniel J. H., Garbrecht, Bjorn, Ramsey-Musolf, Michael J, California Institute of Technology, Pasadena, California 91125, and Tulin, Sean. 2010. "Lepton-mediated electroweak baryogenesis". United States. https://doi.org/10.1103/PHYSREVD.81.063506.
@article{osti_21409373,
title = {Lepton-mediated electroweak baryogenesis},
author = {Chung, Daniel J. H. and Garbrecht, Bjorn and Ramsey-Musolf, Michael J and California Institute of Technology, Pasadena, California 91125 and Tulin, Sean},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.81.063506},
url = {https://www.osti.gov/biblio/21409373}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 6,
volume = 81,
place = {United States},
year = {Mon Mar 15 00:00:00 EDT 2010},
month = {Mon Mar 15 00:00:00 EDT 2010}
}