  The framework of phenomenological quark-antiquark potential (Coulomb plus
linear confinement) model with the Gaussian wave function is used for detailed
study of masses of the ground, orbitally and radially excited states of
heavy-light $Q\overline{q}$, $\left(Q=c,q=u/d,s\right)$ mesons. We incorporate
$\mathcal{O}(1/m)$ correction to the potential energy term and relativistic
corrections to the kinetic energy term of the hamiltonian. The spin-hyperfine,
the spin-orbit and the tensor interactions incorporating the effect of mixing
are employed to obtained the pseudoscalar, the vector, radially and orbitally
excited states meson masses. The Regge trajectories in the $(J,M^{2})$ and
$(n_r,M^{2})$ planes for heavy-light meson are investigated with their
corresponding parameters. Leptonic and radiative leptonic decay widths and
corresponding branching ratios are computed. The mixing parameters are also
estimated in the present work. Our predictions are in good agreement with
experimental results as well as lattice and other theoretical models.
