Speaker
Description
Recently the experimental data attained from the Belle, BABAR, and LHCb experiments, has shown the corporeality of anomalies in the fractions $ R(D)$and $R(D^*)$ coupled with the charged current transition $ b \to c \tau \bar{\nu_{\tau}}$. Also, we observed that lepton flavor universality can be examined through the ratio of leptonic $\Upsilon = \Upsilon(ns) (n=1,2,3)$ and $\psi$ quarkonia decays. We know the Belle informations are in understanding with the standard model(SM) forecasting but the recent world average data are still display a stress. In the BABAR experiment, the neutral current transitions $ b \bar{b} \to \tau \bar{\tau}$ reported that leptonic decay ratio $ R_{\Upsilon}(3s)= Br(\Upsilon(3s) \to \tau \bar{\tau})/ Br(\Upsilon(3s) \to \mu \bar{\mu})$ is showing an agreement with the SM at $1.8 \sigma$ level, where the ratio $R(J/\psi)$ expose discrepancies with resembling SM estimations. We perform an analysis by using a clarify model with extra massive gauge bosons that catenate substantially to left handed leptons of the third generation. We show that $ R_{\Upsilon}(3s)$ and $R(J/\psi)$ cannot be assuredly accommodated together with $ b \to c \tau \bar{\nu_{\tau}}$ data, which tantalizing hints of new anomalous observable.