Light quark dependence of the Isgur-Wise function from QCD sum rules

1994/08/17 by Tao Huang, Chuan-Wang Luo · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.50.5775

published as Phys.Rev.D50:5775-5780,1994 · 13 Pages latex, 9 figures available upon request

arxiv created 1994/08/17 · openalex publication_date 1994/11/01 · arxiv updated 2011/07/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the light quark dependence of the Isgur-Wise function for B_a\ensuremath→D_a and B_a\ensuremath→D_a^* in the framework of QCD sum rules. At zero recoil all the Isgur-Wise functions are equal, as required by heavy quark symmetry, and at nonzero recoil the Isgur-Wise function for B_s decay falls faster than that for B_u,d decay, which is just contrary to the recent prediction of the heavy meson chiral perturbation theory. As a by-product we also estimate SU(3)-breaking effects in the mass and the decay constant.

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