Decay properties of beauty and charm mesons within Isgur–Wise function formalism

We investigate the decay properties of some beauty and charm mesons with a phenomenological potential model. First, we consider nonrelativistic Hamiltonian mesonic system Coulomb plus exponential terms study wave function energy using variational approach. Thereby, compute masses, constants, leptonic branching fractions heavy–light mixing mass parameter $$\Delta {m_{{B_q}}}$$ . radiative widths $${D_s} \rightarrow \gamma \ell {{\bar{\nu }}} $$ , $${D^ - } semileptonic $${{{\bar{B}}}_{(s)}} {D_{(s)}}\ell D_{(s)}^*\ell Using Isgur–Wise function, calculate ratios $$B {D^{(*)}}\pi two-body nonleptonic $$D K\pi Our results are consistent other theoretical models experimental results.