Speaker
Description
We study the interrelation among the $B$ decays mediated by $b \to c \ell \nu_{\ell}$, $b \to s \nu _\ell \nu _\ell$ and $b \to s\ell \ell$ ($\ell = e, \mu, \tau$) quark level transitions in the context of six-dimesional SMEFT operators such as $\mathcal{Q}_{\ell q}^{(3)}$,~$\mathcal{Q}_{\ell ed q}$, $\mathcal{Q}_{\ell e qu}^{(1)}$, $\mathcal{Q}_{\ell e qu}^{(3)}$, $\mathcal{Q}_{\phi q}^{(3)}$ and $\mathcal{Q}_{\ell q}^{(1)}$. We constraint the new physics parameter space using the current experimental observations of the observables $R_D$, $R_{D^*}$, $P_{\tau}(D)$, $P_{\tau}(D^*)$, $F_L(D^*)$, $\mathcal{B}(B_0 \to K^* \nu \nu)$, $\mathcal{B}(B \to K^+ \nu \nu)$, $\mathcal{B}(B \to K^+ \tau^+ \tau^-)$ and $\mathcal{B}(B_s \to \tau^+ \tau^-)$. We then explore the impact of the new physics couplings on several observables such as the branching ratio, forward-backward asymmetry, longitudinal polarisation asymmetry, convexity parameter, and the lepton flavor non-universality observable of $\Sigma_b \to \Sigma_c^{(*)} \tau^-\bar{\nu}_\tau$ and $\Xi_b \to \Xi_c \tau^-\bar{\nu}_\tau$ processes.
| Track type | Flavour Physics |
|---|
