Understanding R(D*,D) Anomaly

Bhaskar Dutta
Texas A&M
Wednesday, February 20, 2019
11:00 am
NS2 1201
In this talk, I will discuss a theory for the R(D*) and R(D) anomaly in terms of a lower mass W_R gauge boson of a class of left-right symmetric models. These models, which are based on the gauge symmetry SU(3)_c x SU(2)_L x SU(2)_R x U(1)_{B-L}, utilize vector-like fermions to generate quark and lepton masses via a universal seesaw mechanism. I will discuss both a parity symmetric as well as an asymmetric version. A light sterile neutrino arises naturally in this setup, which allows for new decay modes of B-meson via right-handed currents. R(D*) and R(D) anomaly can be explained while being consistent with LHC and LEP data as well as low energy flavor constraints arising from various meson mixings for  the allowed range  1.2 (1.8) TeV <  M(W_R) < 3 TeV for parity asymmetric (symmetric) Yukawa sectors.
Felix Kling