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Improved approach to the heavy-to-light form factors in the light-cone QCD sum

Tao Huang·Zuo-Hong Li·Xiang-Yao Wu
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Abstract

A systematic analysis shows that the main uncertainties in the form factors are due to the twist-3 wave functions of the light mesons in the light-cone QCD sum rules. We propose an improved approach, in which the twist-3 wave functions doesn't make any contribution and therefore the possible pollution by them can be avoided, to re-examine $B \to π$ semileptonic form factors. Also, a comparison between the previous and our results from the light-cone QCD sum rules is made. Our method will be beneficial to the precise extracting of $\mid{V_{ub}}\mid$ from the experimental data on the processes $B \to π\ell \widetilde{ν_\ell}$.

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Tao Huang, Zuo-Hong Li, Xiang-Yao Wu. 2001-03-20. Improved approach to the heavy-to-light form factors in the light-cone QCD sum. https://doi.org/10.1103/physrevd.63.094001

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