On Preserving a B+L Asymmetry Produced in the Early Universe

Abstract

One of the most efficient mechanisms for producing the baryon asymmetry of the Universe is the decay of scalar condensates in a SUSY GUT as was first suggested by Affleck and Dine. We show that given a large enough asymmetry, the baryon number will be preserved down to low temperatures even if B - L = 0, because the baryon number carrying scalars form bose condensates that give the W a mass. We derive the conditions on the condensate needed to suppress electroweak sphaleron interactions which would otherwise drive the baryon asymmetry to zero when B - L = 0.

10 pages, LaTeX, UMN-TH-1240, CfPA-TH-94-13, LBL-35275

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• Progress in Electroweak Baryogenesis
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• On the Baryon, Lepton-Flavour and Right-Handed Electron Asymmetries of the Universe
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• Large lepton asymmetry from Q-balls
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• The Cold Big-Bang Cosmology as a Counter-example to Several Anthropic Arguments
• Generation of cosmological large lepton asymmetry from a rolling scalar field
• Large Lepton Asymmetry for Small Baryon Asymmetry and Warm Dark Matter
• On large lepton number asymmetries of the Universe
• Cosmological Moduli Problem in a Supersymmetric Model with Direct Gauge Mediation
• TeV Right-handed Neutrinos and the Flavor-symmetry-improved Seesaw Mechanism
• Constraints on Baryogenesis from the Decay of Superstring Axions