The decays governed by the flavor-changing-neutral-current transitions (FCNC), such as b→ s⁺⁻, provide an important tool to test the physics in and beyond the Standard Model (SM). This work focuses on investigating the FCNC process Bc→ Dₛ* (→ Dₛπ)⁺⁻(=e,μ,τ). Being an exclusive process, the initial and final state meson matrix elements involve the form factors, which are non-perturbative quantities and need to be calculated using specific models. By using the form factors calculated in the covariant light-front quark model, we analyze the branching fractions and angular observables such as the forward-backward asymmetry AFB, polarization fractions (Longitudinal and transverse) FL(T), CP asymmetry coefficients Aᵢ and CP-averaged angular coefficients Sᵢ, both in the SM and some new physics (NP) scenarios. Some of these physical observables are a potential source of finding the physics beyond the SM and help us distinguish various NP scenarios.
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Waseem et al. (2024) studied this question.
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