Light-cone distribution amplitudes for heavy-quark hadrons
نویسندگان
چکیده
منابع مشابه
B Meson Light-cone Distribution Amplitudes and Heavy-quark Symmetry∗
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...
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We introduce and study the properties of the “color-straight” four-quark operators containing heavy and light quark fields. They are of the form (b̄Γbb)(q̄Γqq) where both brackets are color singlets. Their expectation values include the bulk of the nonfactorizable contributions to the nonleptonic decay widths of heavy hadrons. The expectation values of the color-straight operators in the heavy ha...
متن کاملB meson light-cone distribution amplitudes in the heavy-quark limit
We investigate the B meson light-cone distribution amplitudes in the heavyquark limit which are relevant for the QCD factorization approach for the exclusive B meson decays. We derive exact relations between twoand three-particle distribution amplitudes from the QCD equations of motion and heavy-quark symmetry constraint. As solution of these relations, we give representations for the quark-ant...
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...
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...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2013
ISSN: 1029-8479
DOI: 10.1007/jhep11(2013)191