Semileptonic $B_c^{-}\to D^{\ast 0}\ell \nu$ transition in three--point QCD sum rules and HQET with gluon condensate corrections

N. Ghahramany, R. Khosravi, K. Azizi

Taking into account the gluon condensate contributions, the form factors of the semileptonic $B_c^{-}\to D^{\ast 0}\ell \nu$ transition with $l=\tau ,e$ are calculated in the framework of the…