COVARIANT LIGHT-FRONT APPROACH FOR S-WAVE AND P-WAVE MESONS

摘要

We study the decay constants and form factors of the ground-state s-wave and low-lying p-wave mesons within a covariant light-front approach. Numerical results of the B → D~(**) transition form factors, where D~(**) denotes generically a p-wave charmed meson, are compared with other model calculations. Predictions on the decay rates for B → D~(**) π, D_s~(**) D~((*)) are in agreement with the experimental data. The universal Isgur-Wise functions, ξ, τ_(1/2) and τ_(3/2) are obtained. The two-quark picture for D_((s))~(**) works well.