Abstract： We calculate the weak form factors of the decays Bc(B)\to Dlύ by using the chiral current orrelator within the framework of the QCD light-cone sum rules (LCSRs). The expressions of the form factors only depend on the leading twist distribution amplitude (DA) of the D meson. Three models of the D-meson distribution amplitude are employed. Our prediction, by using the D-meson distribution amplitude with the exponential suppression at the end points, favours the three-points sum rule (3PSR) approach with the Coulomb corrections included, and is compatible with other approaches.
ZUO Fen; HUANG Tao. Factors in Light-Cone Sum Rules and the D-Meson Distribution Amplitude[J]. 中国物理快报, 2007, 24(1): 61-64.
ZUO Fen, HUANG Tao. Factors in Light-Cone Sum Rules and the D-Meson Distribution Amplitude. Chin. Phys. Lett., 2007, 24(1): 61-64.
2007, Vol. 24 
