Protecting the Baryon Asymmetry with Thermal Masses

Abstract

We consider the evolution of baryon number $B$ in the early universe under the influence of rapid sphaleron interactions and show that $B$ will remain nonzero at all times even in the case of $B-L=0$. This result arises due to thermal Yukawa interactions that cause nonidentical dispersion relations (thermal masses) for different lepton families. We point out the relevance of our result to the Affleck-Dine type baryogenesis.

11pp., plain tex, UMN-TH-1248/94, CfPA-TH-94-19

References in corpus (6)

• Progress in Electroweak Baryogenesis
• Sphaleron Erasure of Primordial Baryogenesis
• A Lattice Monte Carlo Study of the Hot Electroweak Phase Transition
• On the Baryon, Lepton-Flavour and Right-Handed Electron Asymmetries of the Universe
• On the Erasure and Regeneration of the Primordial Baryon Asymmetry by Sphalerons
• On Non-Perturbative Effects at the High-Temperature Electroweak Phase Transition

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• A remark on sphaleron erasure of baryon asymmetry
• Regulating the Baryon Asymmetry in No-Scale Affleck-Dine Baryogenesis
• Asymmetric Dark Matter Models in SO(10)
• Flavour-Dependent and Basis Independent Measures of R Violation
• The Effect of the Sparticle Mass Spectrum on the Conversion of B-L to B
• Lepton Flavor Asymmetries: from the early Universe to BBN
• Limits on $R$-parity Violation in High Scale Supersymmetry
• Neutrino helicity asymmetries in leptogenesis
• Leptogenesis Scenarios via Non-Thermally Produced Right-handed Neutrino and Sneutrino in Supersymmetric Seesaw Model
• R-Parity Violating Supersymmetry and the 125 GeV Higgs signals
• Primordial Baryon Asymmetry and Sphalerons
• GUT's have the ability to defy sphalerons