Speaker
Description
We do the complete 4-body angular distribution for the decay of $\Lambda_b^0 \to \Lambda_c^{+}(\to \Lambda \pi^{+})\tau \bar{\nu_{\tau}}$.We provide form factor for BGL parametrization and update the SM prediction for angular observables with the LFUV ratio $R(\Lambda_{c})$ which we find consistent with the Lattice.For the first time,the CP violating(CPV) observable are analyzed. Using the recent LHCb result of $\text{$R(\Lambda_{c})$}$ and $F_L(D^*)$ along with the current HFLAV average of $R(D), R(D*)$, we have performed a fit with one and two parameters. We found that a scenario $\mathcal{Re}[C_{V_2}]$, can explain $R(D^*)$ and $R(\Lambda_{c})$ but can't explain $R(D)$ marginally though all 1-operator scenarios can explain all the observable within $2\sigma$. In two-parameter scenario $C_{S_1}-C_T$ is best-fit scenario for explaining all the observable within $1\sigma$. We extensively studied correlations between observables in the presence of both one and two-operator NP scenarios.
| Alternate track | 03. Beyond the Standard Model |
|---|---|
| I read the instructions above | Yes |
