Dirac or inverse seesaw neutrino masses from gauged B-L symmetry
Abstract
The gauged B-L symmetry is one of the simplest and well-studied extension of Standard Model. In the conventional case, addition of three singlet right-handed neutrinos each transforming as - 1 under the B-L symmetry renders it anomaly-free. It is usually assumed that the B-L symmetry is spontaneously broken by a singlet scalar having two units of B-L charge, resulting in a natural implementation of Majorana seesaw mechanism for neutrinos. However, as we discuss here, there is another simple anomaly-free solution which leads to Dirac or inverse seesaw masses for neutrinos. These new possibilities are explored along with an application to neutrino mixing with S3 flavor symmetry.
- Publication:
-
Modern Physics Letters A
- Pub Date:
- August 2015
- DOI:
- 10.1142/S0217732315300207
- arXiv:
- arXiv:1504.00111
- Bibcode:
- 2015MPLA...3030020M
- Keywords:
-
- Neutrino mass mechanisms;
- neutrino mixing;
- right-handed neutrinos;
- Dirac seesaw;
- inverse seesaw;
- B–L symmetry breaking;
- S(3) flavor symmetry;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 12 Pages, Contribution to the proceedings of International Conference on Massive Neutrinos - 2015