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The $ρ$ Meson Light-Cone Distribution Amplitudes of Leading Twist Revisited

P. Ball·V. M. Braun
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Abstract

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 quarks inside longitudinally and transversely polarized $ρ$ mesons have a similar shape, which is in contradiction to previous analyses.

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P. Ball, V. M. Braun. 1996-02-15. The $ρ$ Meson Light-Cone Distribution Amplitudes of Leading Twist Revisited. https://doi.org/10.1103/physrevd.54.2182

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