On Higgs and sphaleron effects during the leptogenesis era

Abstract

We discuss the effects of various processes that can be active during the leptogenesis era, and present the Boltzmann equations that take them into account appropriately. A non-vanishing Higgs number asymmetry is always present, enhancing the washout of the lepton asymmetry. This is the main new effect when leptogenesis takes place at $T>10^{12}$ GeV, reducing the final baryon asymmetry and tightening the leptogenesis bound on the neutrino masses. If leptogenesis occurs at lower temperatures, electroweak sphalerons partially transfer the lepton asymmetry to a baryonic one, while Yukawa interactions and QCD sphalerons partially transfer the asymmetries of the left-handed fields to the right-handed ones, suppressing the washout processes. Depending on the specific temperature range in which leptogenesis occurs, the final baryon asymmetry can be enhanced or suppressed by factors of order 20%--40% with respect to the case when these effects are altogether ignored.

one reference added

References in corpus (16)

• A lower bound on the right-handed neutrino mass from leptogenesis
• Resonant Leptogenesis
• Leptogenesis for Pedestrians
• CP violating decays in leptogenesis scenarios
• Baryogenesis through leptogenesis
• Electroweak-Scale Resonant Leptogenesis
• The Neutrino Mass Window for Baryogenesis
• Effective dynamics of soft non-abelian gauge fields at finite temperature
• Constraints on neutrino masses from leptogenesis models
• The hot baryon violation rate is $O({\alpha }_W^5{T}^4)$
• Hot B violation, color conductivity, and log(1/alpha) effects
• Spectator processes and baryogenesis
• A bound on neutrino masses from baryogenesis
• Computing the Strong Sphaleron Rate
• A remark on sphaleron erasure of baryon asymmetry
• Sphaleron relaxation temperatures

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