Inverse moment of the B s -meson distribution amplitude from QCD sum rule

Abstract

Abstract We derive a QCD sum rule for the inverse moment of the B s -meson light-cone distribution amplitude in HQET. Within this method, the SU(3) f l symmetry violation is traced to the strange quark mass and to the difference between strange and nonstrange quark condensate densities. We predict the ratio of inverse moments λ Bs /λ B = 1.19 ± 0.14 which can be used in various applications of these distribution amplitudes to the analyses of B s -meson decays, provided an accurate value of λ B is available from other sources, such as the B → ℓν ℓ γ decay.

Keywords

• Heavy Quark Physics
• Nonperturbative Effects
• Perturbative QCD