Semileptonic B decays into excited charmed mesons from QCD sum rules

Abstract

Exclusive semileptonic $B$ decays into excited charmed mesons are studied with QCD sum rules in the leading order of heavy quark effective theory. Two universal Isgur-Wise functions \tau and \zeta for semileptonic B decays into four lowest lying excited $D$ mesons ($D_1$, $D_2^{\ast }$, $D_0^{\prime }$, and $D_1^{\prime }$) are determined. The decay rates and branching ratios for these processes are calculated.

Comments: RevTeX, 17 pages including 2 figures