ρ-Meson wave functions from nonlocal light-cone operators with definite twist
نویسندگان
چکیده
منابع مشابه
Construction of nonlocal light–cone operators with definite twist
With the growing precision of data for light– cone dominated hard scattering processes like DIS, DVCS and various (semi) exclusive processes a better perturbative understanding of QCD concerning higher twist contributions is required. Thereby the nonlocal light–cone expansion (LCE) is optimally adapted since the same nonlocal LC operator, and its anomalous dimension, are related to different ph...
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Bilocal light–ray operators which are Lorentz scalars, vectors or antisymmetric tensors, and which appear in various hard QCD scattering processes, are decomposed into operators of definite twist. These operators are harmonic tensor functions and their Taylor expansion consists of (traceless) local light–cone operators which span irreducible representations of the Lorentz group with definite sp...
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We apply the nonlocal condensate formalism to construct generalized sum rules (including O(αs)-radiative corrections) for π-, ρand ρ -meson wave functions of twist 2. Besides, we predict the lepton decay constant fρ′ and estimate the mass of ρ -meson. For all these mesons we obtain the first 10 moments of longitudinal wave functions, suggest the models for them and discuss their properties. We ...
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We give a complete re-analysis of the leading twist quark-antiquark light-cone distribution amplitudes of longitudinal and transverse ρ mesons. We derive Wandzura-Wilczek type relations between different distributions and update the coefficients in their conformal expansion using QCD sum rules including next-to-leading order radiative corrections. We find that the distribution amplitudes of qua...
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The magnetic moment μ of the ρ meson is studied in the light cone QCD sum rule, and it is found that μ = (2.2± 0.2). A comparison of our result on the magnetic moment of the ρ meson with the predictions of the other approaches, is presented. PACS numbers: 11.50.Hx, 13.40.Em e-mail: [email protected] e-mail: [email protected] e-mail: [email protected]
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2001
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(00)01310-1