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arXiv · 1808.00475

Leptogenesis via Varying Weinberg Operator: a Semi-Classical Approach

Silvia Pascoli·Jessica Turner·Ye-Ling Zhou
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Abstract

In this Letter, we introduce leptogenesis via a varying Weinberg operator from a semi-classical perspective. This mechanism is motivated by the breaking of an underlying symmetry which triggers a phase transition that causes the coupling of the Weinberg operator to become dynamical. Consequently, a lepton anti-lepton asymmetry arises from the interference of the Weinberg operator at two different spacetime points. Using this semi-classical approach, we treat the Higgs as a background field and show a reflection asymmetry between the leptons and anti-leptons is generated in the vicinity of the bubble wall. We solve the equations of motion of the lepton and anti-lepton quasiparticles to obtain the final lepton asymmetry.

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Silvia Pascoli, Jessica Turner, Ye-Ling Zhou. 2019-04-17. Leptogenesis via Varying Weinberg Operator: a Semi-Classical Approach. https://doi.org/10.1088/1674-1137%2F43%2F3%2F033101

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