Role of cosmological gravitational particle production in baryogenesis

Flores, Marcos M.; Perez-Gonzalez, Yuber F.

Abstract

We investigate the generation of the baryon asymmetry within the framework of cosmological gravitational particle production, employing the Bogoliubov approach. We examine two well-known baryogenesis scenarios, namely baryogenesis in grand unified theories (GUT) and leptogenesis, while considering reheating temperatures sufficiently low for thermal processes to be negligible. Considering 𝛼–attractor T-models for the inflaton potential, we demonstrate that GUT baryogenesis from scalar decays can be successful across a large range of conformal couplings with gravity, without necessitating substantial levels of 𝐶⁢𝑃 violation. In the case of leptogenesis, we find that the reheating temperature should be 𝑇RH≲106  GeV for right-handed neutrino masses 𝑀1≲6×1012  GeV to generate the observed asymmetry.

Citation

Flores, M. M., & Perez-Gonzalez, Y. F. (2024). Role of cosmological gravitational particle production in baryogenesis. Physical Review D, 109(11), https://doi.org/10.1103/physrevd.109.115017

• Journal Article Type: Article
• Acceptance Date: May 29, 2024
• Online Publication Date: Jun 20, 2024
• Publication Date: Jun 20, 2024
• Deposit Date: Jul 31, 2024
• Publicly Available Date: Jul 31, 2024
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 109
• Issue: 11
• DOI: https://doi.org/10.1103/physrevd.109.115017
• Public URL: https://durham-repository.worktribe.com/output/2641950