B→D(*)form factors in perturbative QCD

2002/10/31 by T. Kurimoto, Hsiang-nan Li, A. I. Sanda · 8 citations
Physics and Astronomy · #Algorithm #B meson #Bar (unit) #Factorization #High-Energy Particle Collisions Research #Lambda #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #hep-ph

paper · pdf · doi:10.1103/physrevd.67.054028

published as Phys.Rev. D67 (2003) 054028 · 17 pages, 9 figures, revtex and epsfig.sty, 1 figure and references added, some comments are added

arxiv created 2002/12/24 · openalex publication_date 2003/03/31 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We calculate the \stackrel\ensuremath→BD^(*) form factors in the heavy-quark and large-recoil limits in the perturbative QCD framework based on the k_T factorization theorem, assuming the hierachy M_B\ensuremath≫M_D^(*)\ensuremath≫\ensuremathΛ, with the B meson mass M_B, the D^(*) meson mass M_D^(*), and the heavy meson and heavy quark mass difference \ensuremathΛ. The qualitative behavior of the light-cone D^(*) meson wave function and the associated Sudakov resummation are derived. The leading-power contributions to the \stackrel\ensuremath→BD^(*) form factors, characterized by the scale \ensuremathΛ√M_B/M_D^(*), respect the heavy-quark symmetry. The next-to-leading-power corrections in 1/M_B and 1/M_D^(*), characterized by a scale larger than √\ensuremathΛM_B, are estimated to be less than 20%. The D^(*) meson wave function is determined from the fit to the observed \stackrel\ensuremath→BD^(*)l\ensuremathν decay spectrum, which can be employed to make predictions for nonleptonic decays, such as \stackrel\ensuremath→BD^(*)\ensuremathπ(\ensuremathρ).

Citations

• Lattice QCD calculation ofB¯→Dlν¯decay form factors at zero recoil
• Applicability of perturbative QCD toB→Ddecays
• Gauge invariant and infrared finite theory of nonleptonic heavy meson decays
• Measurement of (→Dℓ) and determination of |V|
• Perturbative QCD study ofB→D(*)decays
• Varumärken : en studie om idrottsföreningar under starka klubbvarumärken
• Sudakov effects in B→πℓνℓ form factors

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