Decay $B_c^+ \to D_{(s)}^{(*)+} \ell^+\ell^-$ within covariant confined quark model

TL;DR

This paper investigates rare semileptonic decays of $B_c$ mesons using a covariant confined quark model, calculating form factors, branching fractions, and angular observables across the full momentum transfer range.

Contribution

It provides comprehensive calculations of transition form factors and physical observables for $B_c$ decays within a covariant confined quark model, extending previous theoretical analyses.

Findings

Computed form factors for $B_c^+ o D^{(*)+}$ and $B_c^+ o D_s^{(*)+}$ decays.

Calculated branching fractions and compared with existing theoretical results.

Analyzed angular observables such as forward-backward asymmetry and polarization.

Abstract

We study the rare semileptonic decays of $B_c$ mesons within the effective field theoretical framework of covariant confined quark model. The transition form factors corresponding to $B_c^+ \to D^{(*)+}$ and $B_c^+ \to D_s^{(*)+}$ are computed in the entire $q^2$ range. Using form factors, we compute the branching fractions and compare them with the available theoretical results. We also compute various physical observables such as forward-backward asymmetry, longitudinal and transverse polarizations as well as clean angular observables.