Study of charm and beauty mass spectra, semileptonic decays of B(s,c) and Bc→J/ψ(ηc)+P(V) in a phenomenological potential model.

Using a non-relativistic potential model, we obtain the mass spectra, leptonic decay constants, and parameters of the Isgur-Wise function for the beauty and charm mesons. With the calculated quantities, we investigate purely leptonic decays of B + , B ∗ , B c + , semileptonic decay modes B (s) → D (s) l ν and B c → η c ℓ ν ¯ for three lepton channels e , μ , τ , and obtain the corresponding branching fractions. B ¯ (s) → D (s) ∗ l ν ¯ transitions are also studied. Next, we apply the form factors for spin zero and spin one transitions of B c to calculate the nonleptonic branching ratios of B c → J / ψ (η c) + P (V) , where P and V stand for the D q ∗ - vector meson and the D q pseudoscalar meson, respectively. Our results are found to be in agreement with those obtained in the experimental and theoretical results. [ABSTRACT FROM AUTHOR]