Beyond Standard Model: From Theory to Experiment (BSM- 2023)

Dark Matter and Muon (g-2) from a discrete Z_4 Symmetric Model

Not scheduled

20m

Session 13

Speaker

Bhag C. (Central University of Himachal Pradesh)

Description

The small neutrino mass and nature of Dark Matter (DM) is still unknown within Standard
Model (SM). In 2021, there was 4.2σ discrepancy in the measurement of muon magnetic moment
reported by Fermilab. Recently, Fermilab released its precised results for muon’s magnetic
moment and it shows 5.1σ discrepancy with SM results. In this work, we study the connection
between neutrino masses, muon (g −2) anomaly and Dark Matter within a framework based on
Z4 extension of the scotogenic model, in which the neutrino masses are generated at one loop
level. We extend the model with a vector like lepton (VLL) triplet in order to explain muon
(g−2). The coupling of VLL triplet ψT to inert doublet η provides positive contribution to muon
anomalous magnetic moment. We also studied the DM phenomenology of ψT by considering the
neutral component of ψT as the lightest DM candidate. We show that, for mass of VLL triplet
MψT
in TeV scale, the model can well explain muon (g −2) anomaly and also gives correct relic
density.