Semileptonic decays $B_c\to ({\eta }_c,J/\psi )l{\bar{\nu }}_l$ in the "PQCD + Lattice" approach

Xue-Qing Hu, Su-Ping Jin, Zhen-Jun Xiao

In this paper, we studied the semileptonic decays $B_c^{-}\to ({\eta }_c,J/\psi )l^{-}{\bar{\nu }}_l$ by employing the PQCD factorization approach, using the newly defined distribution amplitudes…