Leptogenesis via a varying Weinberg operator: a semi-classical approach

Pascoli, Silvia; Turner, Jessica; Zhou, Ye-Ling

Abstract

In this paper, 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 the semi-classical approach, we treat the Higgs as a background field and show that a reflection asymmetry between 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.

Citation

Pascoli, S., Turner, J., & Zhou, Y.-L. (2019). Leptogenesis via a varying Weinberg operator: a semi-classical approach. Chinese Physics C, 43(3), Article 033101. https://doi.org/10.1088/1674-1137/43/3/033101

• Journal Article Type: Article
• Online Publication Date: Mar 1, 2019
• Publication Date: Mar 31, 2019
• Deposit Date: Mar 14, 2019
• Publicly Available Date: Mar 14, 2019
• Journal: Chinese Physics C
• Print ISSN: 1674-1137
• Electronic ISSN: 2058-6132
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 43
• Issue: 3
• Article Number: 033101
• DOI: https://doi.org/10.1088/1674-1137/43/3/033101
• Public URL: https://durham-repository.worktribe.com/output/1301248