XXV DAE-BRNS High Energy Physics Symposium 2022

Study on the neutrino masses and mixings, baryogenesis and effects of keV-scale sterile neutrino as dark matter

13 Dec 2022, 14:00

1h

LHC Foyer (IISER Mohali)

Poster Poster - 2

Speaker

Soram Robertson Singh (Manipur University)

Description

We develop an $A_4\times Z_4\times Z_2$ symmetry model of neutrino masses and mixings within the Minimal Extended Seesaw mechanism where three right-handed neutrinos $N_1$ , $N_2$ and $N_3$ and a keV-scale singlet sterile neutrino $S$ are added to the Standard Model. This model breaks $\mu -\tau$ symmetry of neutrino mass matrix and successfully explains leptonic mixing with non-zero ${\theta }_{13}$. We study the phenomenological results of the keV-scale sterile neutrino as a dark matter candidate by calculating the relic abundance of the sterile neutrino and its decay rate. The effects on effective neutrino mass in neutrinoless double beta decay as well as baryogenesis via resonant leptogenesis is also studied and significant results are observed within the experimental bounds.