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

• Published in: The journal of high energy physics Vol. 2020; no. 10
• Main Authors: Khodjamirian, Alexander, Mandal, Rusa, Mannel, Thomas
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-10-2020
• Subjects: Classical and Quantum Gravitation; Elementary Particles; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; String Theory; Heavy Quark Physics; Nonperturbative Effects; Perturbative QCD
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP10(2020)043

A
bstract
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.