Majorana Dark Matter, Neutrino Mass, and Flavor Anomalies in Lμ- Lτ Model

Abstract

We investigate Majorana dark matter in a new variant of U(1)Lμ-Lτ gauge extension of Standard Model, where the scalar sector is enriched with an inert doublet and a (3 ¯, 1, 1 / 3 ) scalar leptoquark. We constrain the parameter space consistent with Planck limit on relic density, PICO-60 bound on spin-dependent direct detection cross section. Further, we constrain the new couplings from the present experimental data on Br (τ→ μντν¯μ), Br (B→ Xsγ), Br (B¯0→ K¯0μ+μ-), Br (B+→ K+τ+τ-), and Bs- Bs¯ mixing. Using the allowed parameter space, we estimate the P4,5′ observables and the lepton nonuniversality parameters, RK(∗) and Rϕ. We also briefly discuss about the neutrino mass generation at one-loop level. © 2021, Springer Nature Singapore Pte Ltd.