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

Pascoli, Silvia and Turner, Jessica and Zhou, Ye-Ling (2019) 'Leptogenesis via a varying Weinberg operator : a semi-classical approach.', Chinese physics C., 43 (3). 033101.


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.

Item Type:Article
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Publisher statement:Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.
Date accepted:No date available
Date deposited:14 March 2019
Date of first online publication:01 March 2019
Date first made open access:14 March 2019

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