Leptogenesis in the Neutrino Option

Brivio, I.; Moffat, K.; Pascoli, S.; Petcov, S.T.; Turner, J.

Abstract

We examine the compatibility between the Neutrino Option, in which the electroweak scale is generated by PeV mass type I seesaw Majorana neutrinos, and leptogenesis. We find the Neutrino Option is consistent with resonant leptogenesis. Working within the minimal seesaw scenario with two heavy Majorana neutrinos N1, 2, which form a pseudo-Dirac pair, we explore the viable parameter space. We find that the Neutrino Option and successful leptogenesis are compatible in the cases of a neutrino mass spectrum with normal (inverted) ordering for 1.2 × 106 < M(GeV) < 8.8 × 106(2.4 × 106 < M(GeV) < 7.4 × 106), with M = (M1 + M2)/2 and M1, 2 the masses of N1, 2. Successful leptogenesis requires that ∆M/M ≡ (M2 − M1)/M ∼ 10−8. We further show that leptogenesis can produce the baryon asymmetry of the Universe within the Neutrino Option scenario when the requisite CP violation in leptogenesis is provided exclusively by the Dirac or Majorana low energy CP violation phases of the PMNS matrix.

Citation

Brivio, I., Moffat, K., Pascoli, S., Petcov, S., & Turner, J. (2019). Leptogenesis in the Neutrino Option. Journal of High Energy Physics, 2019(10), Article 59. https://doi.org/10.1007/jhep10%282019%29059

• Journal Article Type: Article
• Acceptance Date: Sep 18, 2019
• Online Publication Date: Oct 7, 2019
• Publication Date: Oct 31, 2019
• Deposit Date: Oct 31, 2019
• Publicly Available Date: Oct 31, 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: 2019
• Issue: 10
• Article Number: 59
• DOI: https://doi.org/10.1007/jhep10%282019%29059
• Public URL: https://durham-repository.worktribe.com/output/1315936