B to light meson transition form-factors calculated in perturbative QCD approach
Dec, 2002
21 pages
Published in:
- Eur.Phys.J.C 28 (2003) 515-523
e-Print:
- hep-ph/0212373 [hep-ph]
Report number:
- BIHEP-TH-2002-62
View in:
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Abstract: (arXiv)
We calculate the , (P: light pseudoscalar meson, V light vector meson) form factors in the large-recoil limit in perturbative QCD approach, including both the vector (axial vector) and tensor operators. In general there are two leading components and for meson wave functions. We consider both contributions of them. Sudakov effects ( and threshold resummation) are included to regulate the soft end-point singularity. By choosing the hard scale as the maximum virtualities of internal particles in the hard -quark decay amplitudes, Sudakov factors can effectively suppress the long-distance soft contribution. Hard contribution can be dominant in these approaches.Note:
- 21 pages, with 2 figures
- B: hadronic decay
- decay: inclusive reaction
- pseudoscalar meson
- vector meson
- quantum chromodynamics: perturbation theory
- decay: form factor
- B: wave function
- effect: Sudakov
- meson: wave function
- numerical calculations
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