Assessing perturbativity and vacuum stability in high-scale leptogenesis

Ipek, Seyda; Plascencia, Alexis D.; Turner, Jessica

Abstract

We consider the requirements that all coupling constants remain perturbative and the electroweak vacuum metastable up to the Planck scale in high-scale thermal leptogenesis, in the context of a type-I seesaw mechanism. We find a large region of the model parameter space that satisfies these conditions in combination with producing the baryon asymmetry of the Universe. We demonstrate these conditions require Tr[Y † N YN ] . 0.66 on the neutrino Yukawa matrix. We also investigate this scenario in the presence of a large number NF of coloured Majorana octet fermions in order to make quantum chromodynamics asymptotically safe in the ultraviolet.

Citation

Ipek, S., Plascencia, A. D., & Turner, J. (2018). Assessing perturbativity and vacuum stability in high-scale leptogenesis. Journal of High Energy Physics, 2018(12), Article 111. https://doi.org/10.1007/jhep12%282018%29111

• Journal Article Type: Article
• Acceptance Date: Dec 7, 2018
• Online Publication Date: Dec 18, 2018
• Publication Date: Dec 18, 2018
• Deposit Date: Jan 3, 2019
• Publicly Available Date: Jan 3, 2019
• Journal: Journal of High Energy Physics
• Print ISSN: 1126-6708
• Electronic ISSN: 1029-8479
• Publisher: Scuola Internazionale Superiore di Studi Avanzati (SISSA)
• Peer Reviewed: Peer Reviewed
• Volume: 2018
• Issue: 12
• Article Number: 111
• DOI: https://doi.org/10.1007/jhep12%282018%29111
• Public URL: https://durham-repository.worktribe.com/output/1311052