Baryogenesis via gauge field production from a relaxing Higgs

Abstract

We show that the baryon asymmetry of the universe can be explained in models where the Higgs couples to the Chern-Simons term of the hypercharge group and is away from the late-time minimum of its potential during inflation. The Higgs then relaxes toward this minimum once inflation ends which leads to the production of (hyper)magnetic helicity. We discuss the conditions under which this helicity can be approximately conserved during its joint evolution with the thermal plasma. At the electroweak phase transition the helicity is then converted into a baryon asymmetry by virtue of the chiral anomaly in the standard model. We propose a simple model which realizes this mechanism and show that the observed baryon asymmetry of the universe can be reproduced.

35 pages, 10 figures, 2 tables; v2: small improvements, added comments and references, matches published version

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Cited by in corpus (6)

• Numerical study of the Schwinger effect in axion inflation
• Baryogenesis from combined Higgs - scalar field inflation
• Baryogenesis in $R^2$-Higgs Inflation: the Gravitational Connection
• Baryogenesis from Higgs Inflation
• Fate of the first-order chiral phase transition in QCD: Implications for dark QCD studied via a Nambu-Jona-Lasinio model
• First-order CP phase transition in two-flavor QCD at $\theta =\pi$ under electromagnetic scale anomaly via a Nambu-Jona-Lasinio description