XXVI DAE-BRNS High Energy Physics Symposium 2024

The role of QCD-inspired model in deciphering semileptonic and radiative Bc decays

Not scheduled

20m

Swatantrata Bhavan, Banaras Hindu University, Varanasi

Oral Quark and lepton flavour physics

Speaker

Dr Sonali Patnaik (National Institute of Science Education and Research)

Description

We conduct an analysis of electromagnetic and semileptonic decay modes of $B_c$ mesons using a QCD-inspired phenomenological model. In light of recent observations of anomalies in LHC involving the $\mathcal{R}$-Ratios, $\tau$-polarization $(\mathcal{P}\tau )$, and forward-backward asymmetry $({\mathcal{A}}_{FB})$ — which are particularly sensitive to New Physics, we investigate observables for the decay channels: $B_c\to {\eta }_c(J/\psi )\tau {\nu }_{\tau }$ and $B_c\to D(D^{\ast })\tau {\nu }_{\tau }$ within a potential model framework. We also study the radiative channel: $B_c^{\ast }\to B_c\gamma$ where we considered a typical case of $B_c^{\ast }(1S)\to B_c(1S)\gamma$, our predicted decay width is found quite sensitive to the mass difference between $B_c^{\ast }$ and $B_c$ mesons which may help in determining the mass of $B_c^{\ast }$ experimentally. Additionally, we calculate the vector, pseudoscalar and electromagnetic form factors, examining their $q^2$ dependence for these transitions in both ground and radially excited states. Given the fluctuating appearance and disappearance of flavor anomalies in the Run 3 data collection period, this study seeks to identify different measurement tools, capable of probing the limited regions of theoretical parameter space