Baryogenesis via leptonic CP-violating phase transition

Journal Article · 06 March 2018 · Physics Letters. B

DOI: https://doi.org/10.1016/j.physletb.2018.03.011 · OSTI ID:1462228

Pascoli, Silvia ^[1]; Turner, Jessica  ^[2]; Zhou, Ye -Ling  ^[1]

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1. Durham Univ., Durham (United Kingdom)
2. Durham Univ., Durham (United Kingdom); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Here, 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.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1462228
• Report Number(s): FERMILAB-PUB--18-362-T; IPPP--16-83; arXiv:1609.07969; 1488136
• Journal Information: Physics Letters. B, Journal Name: Physics Letters. B Journal Issue: C Vol. 780; ISSN 0370-2693
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English