XXVI DAE-BRNS High Energy Physics Symposium 2024

Bc to A transition form factors and semileptonic decays in self-consistent covariant light-front approach

Not scheduled

20m

Swatantrata Bhavan, Banaras Hindu University, Varanasi

Postar Quark and lepton flavour physics

Speaker

AVIJIT HAZRA (SRM Institute of Science and Technology)

Description

We study the semileptonic weak decays of the Bc meson decaying to axial-vector (A) mesons in the final state for bottom-conserving decay modes. We use the self-consistent covariant light-front quark model (CLF QM) to eliminate the inconsistencies in the traditional type-I CLF QM.  We establish the self-consistency for Bc → A meson transition form factors and ensure that these form factors are free from zero-mode contributions. Further, we show that the problems of inconsistency and violation of covariance of CLF QM are resolved in self-consistent CLF QM for Bc → A transitions. We employ a vector meson dominance-inspired q2 dependence to determine the form factors within the space-like region and then extrapolate these form factors into the time-like region. Additionally, we predict the branching ratios of the semileptonic weak decays of Bc meson to quantify the effects of self-consistency in these decays. Furthermore, we evaluate the lepton mass effect on these branching ratios and other experimentally important physical observables.