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

Journal of High Energy Physics

Thomas Mannel¹  Rusa Mandal¹  Alexander Khodjamirian¹ 

[1] Theoretische Physik 1, Naturwissenschaftlich-Technische Fakultät, Universität Siegen, 57068, Siegen, Germany;

关键词: Heavy Quark Physics;    Nonperturbative Effects;    Perturbative QCD;   

DOI  :  10.1007/JHEP10(2020)043

来源: Springer

【 摘 要 】

We derive a QCD sum rule for the inverse moment of the Bs-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 λBs/λB = 1.19 ± 0.14 which can be used in various applications of these distribution amplitudes to the analyses of Bs-meson decays, provided an accurate value of λB is available from other sources, such as the B → ℓνℓγ decay.

【 授权许可】

CC BY