realization of linear seesaw and neutrino phenomenology

M. Sruthilaya; Rukmani Mohanta; Sudhanwa Patra

doi:10.1140/epjc/s10052-018-6181-6

EPJ

realization of linear seesaw and neutrino phenomenology

M. Sruthilaya¹, Rukmani Mohanta¹ and Sudhanwa Patra²^*

¹ School of Physics, University of Hyderabad, Hyderabad, 500046, India
² Indian Institute of Technology Bhilai, GEC Campus, Sejbahar, Raipur, Chhattisgarh, 492015, India

Received: 15 October 2017
Accepted: 23 August 2018
Published online: 5 September 2018

Abstract

Motivated by the crucial role played by the discrete flavor symmetry groups in explaining the observed neutrino oscillation data, we consider the $$A_4$$

realization of linear seesaw by extending the standard model (SM) particle content with two types of right-handed (RH) neutrinos along with the flavon fields, and the SM symmetry with $A_4\times Z_4\times Z_3$ and a global symmetry $$U(1)_X$$

, which is broken explicitly by the Higgs potential. We scrutinize this model to see if it can explain the recent results from neutrino oscillation experiments, by searching for parameter space that can accommodate the observables such as the reactor mixing angle $\theta _{13}$ , the CP violating phase $\delta _\text {CP}$ , sum of active neutrino masses $\Sigma _{i} m_i$ , solar and atmospheric mass-squared differences, and the lepton number violating parameter called the effective Majorana mass parameter, in line with recent experimental results. We also discuss the scope of this model to explain the baryon asymmetry of the Universe through leptogenesis. We also investigate the possibility of probing the non-unitarity effect in this scenario, but it is found to be rather small.

12 Internat. Congress of the Balkan Physical Union
July 8-12, 2025
Bucharest, Romania

EPJ

realization of linear seesaw and neutrino phenomenology

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