Baryogenesis via leptonic CP-violating phase transition

We propose a new mechanism to generate a lepton asymmetry based on the vacuum CP-violating phase transition (CPPT). This approach differs from classical thermal leptogenesis as a specific seesaw model, and its UV completion, need not be specified. The lepton asymmetry is generated via the dynamicall...

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Bibliographic Details
Published inPhysics letters. B Vol. 780; no. C; pp. 313 - 318
Main Authors Pascoli, Silvia, Turner, Jessica, Zhou, Ye-Ling
Format Journal Article
LanguageEnglish
Published United States Elsevier B.V 10.05.2018
Elsevier
Subjects
Leptogenesis
Phase transition
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Weinberg operator
Leptogenesis
Weinberg operator
Phase transition
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Summary:We propose a new mechanism to generate a lepton asymmetry based on the vacuum CP-violating phase transition (CPPT). This approach differs from classical thermal leptogenesis as a specific seesaw model, and its UV completion, need not be specified. The lepton asymmetry is generated via the dynamically realised coupling of the Weinberg operator during the phase transition. This mechanism provides a connection with low-energy neutrino observables.
Bibliography:AC02-07CH11359
USDOE Office of Science (SC), High Energy Physics (HEP)
IPPP-16-83; FERMILAB-PUB-18-362-T; arXiv:1609.07969
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2018.03.011