B to light meson transition form factors calculated in perturbative QCD approach

2002/12/31 by Cai-Dian Lü, Cai-Dian Lu, Mao-Zhi Yang +1 · 10 citations
Chemistry · Physics and Astronomy · #Chemistry #High-Energy Particle Collisions Research #Meson #Non-perturbative #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Transition (genetics) #hep-ex #hep-ph

paper · pdf · doi:10.1140/epjc/s2003-01199-y

published as Eur.Phys.J.C28:515-523,2003 · 21 pages, with 2 figures

arxiv created 2002/12/31 · openalex publication_date 2003/06/01 · arxiv updated 2014/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We calculate the B→ P, B→ V (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 ϕ_B and ϕ_B for B meson wave functions. We consider both contributions of them. Sudakov effects (k_⊥ 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 b-quark decay amplitudes, Sudakov factors can effectively suppress the long-distance soft contribution. Hard contribution can be dominant in these approaches.

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