Factors in Light-Cone Sum Rules and the D-Meson Distribution Amplitude

Chin. Phys. Lett.

2007, Vol. 24

Issue (1): 61-64 DOI:

Original Articles

Factors in Light-Cone Sum Rules and the D-Meson Distribution Amplitude

ZUO Fen; HUANG Tao

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049

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ZUO Fen, HUANG Tao 2007 Chin. Phys. Lett. 24 61-64

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Abstract We calculate the weak form factors of the decays B_c(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.

Keywords: 13.20.He 13.20.Fc 11.55.Hx

Published: 01 January 2007

PACS:	13.20.He	(Decays of bottom mesons)
	13.20.Fc	(Decays of charmed mesons)
	11.55.Hx	(Sum rules)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2007/V24/I1/061

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