Effects of reheating on charged lepton Yukawa equilibration and leptogenesis

Datta, Arghyajit, Roshan, Rishav and Sil, Arunansu (2024) Effects of reheating on charged lepton Yukawa equilibration and leptogenesis. Physical Review Letters, 132 (6), [061802]. (doi:10.1103/PhysRevLett.132.061802).

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Abstract

We show that the process of noninstantaneous reheating during the postinflationary period can have a sizable impact on the charged lepton Yukawa equilibration temperature in the early Universe. This suggests reviewing the effects of lepton flavors in the leptogenesis scenario where the production and decay of right-handed neutrinos take place within this prolonged era of reheating. We find this observation has the potential to shift the flavor regime(s) of leptogenesis compared to the standard thermal scenario.

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2206.10650v2 - Accepted Manuscript

Available under License University of Southampton Accepted Manuscript Licence.

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Submitted date: 21 June 2022

Accepted/In Press date: 17 January 2024

Published date: 9 February 2024

Additional Information: Publisher Copyright: © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

Keywords: hep-ph