Speaker
Description
More evidence of New Physics (NP) has been observed in charged current decays of $\bar{B} \to {D^*} \ell \bar{\nu}$, as measured by the BaBar, Belle, and LHCb experiments. Curiously, the observable $R_{D^*}$ has been found to exceed Standard Model (SM) expectations, with a combined significance of $3.4\sigma$. Moreover, there is further motivation for NP in the muon sector due to persistent anomalies in the muon anomalous magnetic moment $((g-2)_\mu)$ and in neutral current processes such as $b \to s \mu^+ \mu^-$.In this work, we investigate the differential decay distributions of $\bar{B} \to D^* \ell \bar{X}$, where $X$ is a heavy right-handed neutrino. To explore NP signatures associated with such a neutrino, we employ a newly developed Monte Carlo event generator built upon the EvtGen framework, tailored specifically to simulate beyond-the-Standard-Model processes.
Our study includes an analysis of angular observables and kinematic distributions, with particular emphasis on forward-backward asymmetries, such as $\Delta A_\text{FB} = A_\text{FB}^\mu - A_\text{FB}^e$, among others. These observables offer valuable insight into potential deviations from SM predictions and represent a promising avenue for probing the existence of right-handed neutrinos in semileptonic $B$-meson decays.
| Mini Symposia (Invited Talks Only) | Mini Symposia (Invited Talks Only) |
|---|
