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  • Letter
  • Open Access

Baryogenesis in the standard model and its supersymmetric extension

Chee Sheng Fong*

  • Centro de Ciências Naturais e Humanas Universidade Federal do ABC, 09.210-170 Santo André, SP, Brazil

  • *sheng.fong@ufabc.edu.br
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Phys. Rev. D 103, L051705 – Published 26 March, 2021

DOI: https://doi.org/10.1103/PhysRevD.103.L051705

Abstract

In this work, we classify all the effective U(1) symmetries and their associated Noether charges in the standard model (SM) and its minimal supersymmetric extension (MSSM) from the highest scale after inflation down to the weak scale. We then demonstrate that the discovery of the violation of baryon minus lepton number (B−L), which pinpoints to its violation in the primordial Universe at any cosmic temperature above 30 TeV, will open up a new window of baryogenesis in these effective charges above this scale. While the fast SM baryon number violation in the early Universe could be the first piece to solve the puzzle of cosmic baryon asymmetry, (B−L) violation could be the second important piece. In the background of an expanding Universe, there is ample opportunity for out-of-equilibrium processes to generate an asymmetry in the numerous effective charges in the SM or the MSSM, making a baryon-asymmetric Universe almost unavoidable. Finally, we provide examples in the SM and the MSSM where baryogenesis can proceed through out-of-equilibrium dynamics without explicitly breaking baryon or lepton number.

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Phys. Rev. D 103, L051705– Published 26 March, 2021
  • Received 15 December 2020
  • Accepted 10 March 2021
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Published by the American Physical Society under the terms of the 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.

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