Speaker
Description
The value of muon magnetic moment, recently, reported by Fermilab has $4.2 \sigma$ discrepancy with the theoretical prediction which is a robust signal for physics beyond the SM. In this work, we consider $U(1)_{L_{\mu}-L_{\tau}}$ extension of the scotogenic model to explain non-zero neutrino mass and muon ($g-2$), simultaneously. It is known that muon neutrino trident (MNT) process put an upper bound on mass of gauge boson $M_{Z_{\mu\tau}}<300$ MeV to accommodate muon ($g-2$) anomaly. We have constrained the $vev$ of scalar singlet responsible for the mass of gauge boson using low energy neutrino data. We find that there exist a range of $M_{Z_{\mu\tau}}$ above 300 MeV giving consistent neutrino phenomenology. In this case, it is shown that muon ($g-2$) can be explained by adding a vector like lepton triplet with appropriate $L_{\mu}-L_{\tau}$ charge such that it only couples to muon through inert doublet $\eta$. We have, also, investigated the implication of the model for $CP$ violation and effective Majorana neutrino mass $m_{ee}$ appearing in neutrinoless double beta ($0\nu\beta\beta$) decay process.
| Session | Neutrino Physics |
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