SU{sub f}(3)-symmetry breaking effects of the B{yields}K transition form factor in the QCD light-cone sum rules
- Department of Physics, Chongqing University, Chongqing 400044 (China)
- Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918(4), Beijing 100049 (China)
We present an improved calculation of the B{yields}K transition form factor with a chiral current in the QCD light-cone sum rule approach. Under the present approach, the most uncertain twist-3 contribution is eliminated. And the contributions from the twist-2 and the twist-4 structures of the kaon wave function are discussed, including the SU{sub f}(3)-breaking effects. One-loop radiative corrections to the kaonic twist-2 contribution together with the leading-order twist-4 corrections are studied. The SU{sub f}(3)-breaking effect is obtained, (F{sub +}{sup B{r_reversible}}{sup K}(0)/F{sub +}{sup B{r_reversible}}{sup {pi}}(0))=1.16{+-}0.03. By combining the light-cone sum rule results with the newly obtained perturbative QCD results that have been calculated up to O(1/m{sub b}{sup 2}) by Wu, Huang, and Fang [Eur. Phys. J. C 52, 561 (2007)], we present a consistent analysis of the B{yields}K transition form factor in the large and intermediate energy regions.
- OSTI ID:
- 21249926
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 7; Other Information: DOI: 10.1103/PhysRevD.77.074001; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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