The Meson Light-Cone Distribution Amplitudes of Leading Twist Revisited
Abstract
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 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 quarks inside longitudinally and transversely polarized mesons have a similar shape, which is in contradiction to previous analyses.
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