Flavoured CP-asymmetry at the effective neutrino mass floor

Narendra, Nimmala and Sahu, Narendra and Sankar, S Uma (2020) Flavoured CP-asymmetry at the effective neutrino mass floor. arXiv.org.


Download (1MB) | Preview


Both neutrinoless double beta decay and leptogenesis require neutrinos to be Majorana fermions. A relation between these two phenomena can be derived once the mechanism of neutrino mass generation is specified. We first derive the constraints on the Majorana phases by minimising the effective neutrino mass in neutrinoless double beta decay with respect to the smallest mass among the light neutrinos. Given these phases, we derive a lower bound on M1 (the mass of the lightest of the heavy neutrinos) in the framework of Type-I seesaw mechanism, subject to the constraint that the CP asymmetry required for adequate leptogenesis is larger than 10−8 . We find that M1 ≥ 1010 (109 ) GeV for the case of Normal (Inverted) hierarchy. We extend our analysis to the case when one of the heavy neutrinos decouples (two right handed neutrino models). In this case we find M1 ≥ 1010 (1011) GeV for the case of Normal (Inverted) hierarchy.

[error in script]
IITH Creators:
IITH CreatorsORCiD
Item Type: Article
Subjects: Physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 26 Feb 2020 04:26
Last Modified: 26 Feb 2020 04:26
URI: http://raiith.iith.ac.in/id/eprint/7471
Publisher URL:
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 7471 Statistics for this ePrint Item