Brivio, I. and Moffat, K. and Pascoli, S. and Petcov, S.T. and Turner, J. (2019) 'Leptogenesis in the neutrino option.', Journal of high energy physics., 2019 (10). p. 59.
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.
|Full text:||(VoR) Version of Record|
Available under License - Creative Commons Attribution.
Download PDF (1722Kb)
|Publisher Web site:||https://doi.org/10.1007/JHEP10(2019)059|
|Publisher statement:||This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.|
|Date accepted:||18 September 2019|
|Date deposited:||31 October 2019|
|Date of first online publication:||07 October 2019|
|Date first made open access:||31 October 2019|
Save or Share this output
|Look up in GoogleScholar|