B -meson light-cone distribution amplitude from Euclidean quantities
نویسندگان
چکیده
منابع مشابه
Renormalization-group evolution of the B-meson light-cone distribution amplitude.
An integro-differential equation governing the evolution of the leading-order B-meson light-cone distribution amplitude is derived. The anomalous dimension in this equation contains a logarithm of the renormalization scale, whose coefficient is identified with the cusp anomalous dimension of Wilson loops. The exact solution of the evolution equation is obtained, from which the asymptotic behavi...
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Recently systematic methods based on the QCD factorization have been developed for the exclusive B meson decays into light mesons (for other approaches see). Essential ingredients in this approach are the light-cone distribution amplitudes for the participating mesons, which constitute nonperturbative long-distance contribution to the factorized amplitudes. For the light mesons (π, K, ρ, K, etc...
متن کاملB - Meson Distribution Amplitude from the B → π Form Factor
Employing the light-cone sum rule approach in QCD, we relate the B-meson distribution amplitude to the B → π form factor at zero momentum transfer. In leading order, the sum rule is converted into a simple expression for the inverse moment λB of the distribution amplitude φ+. Using as an input the B → π form factor calculated from the light-cone sum rule in terms of pion distribution amplitudes...
متن کاملThe Meson Light - Cone Distribution Amplitudes
We give a complete re-analysis of the leading twist quark-antiquark light-cone distribution amplitudes of longitudinal and transverse mesons. We derive Wandzura-Wilczek type relations between diierent distributions and update the coeecients in their confor-mal expansion using QCD sum rules including next-to-leading order radiative corrections. We nd that the distribution amplitudes of quarks in...
متن کاملModels for Light-Cone Meson Distribution Amplitudes
Leading-twist distribution amplitudes (DAs) of light mesons like π, ρ etc. describe the leading nonperturbative hadronic contributions to exclusive QCD reactions at large energy transfer, for instance electromagnetic form factors. They also enter B decay amplitudes described in QCD factorisation, in particular nonleptonic two-body decays. Being nonperturbative quantities, DAs cannot be calculat...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2020
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.102.011502