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$B-pi$ weak form factor with chiral current in the light-cone sum rules | | Zhi-Gang Wang
; Ming-Zhen Zhou
; Tao Huang
; | | Date: |
23 Dec 2002 | | Journal: | Phys.Rev. D67 (2003) 094006 | | Subject: | hep-ph | | Abstract: | In this article, we calculate the $B o pi$ transition form factor $f^{+}_{Bpi}(q^2)$ by including perturbative $O(alpha_s)$ corrections to the twist-2 terms with chiral current in the light-cone QCD sum rule approach. The corrections to the product $f_Bf^{+}_{Bpi}(q^2)$ in the leading twist approximation is found to be about 30%, while a similar magnitude corresponding to $O(alpha_s)$ corrections for $f_B(q^2)$ in the two-point sum rule cancel them and result in small net corrections for $f^{+}_{Bpi}(q^2)$. Our results confirm the observations made in previous light-cone QCD sum rule studies. | | Source: | arXiv, hep-ph/0212336 | | Services: | Forum | Review | PDF | Favorites | |
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