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arXiv · hep-ph/0007279

Higher Twist Distribution Amplitudes of the Nucleon in QCD

V. Braun·R. J. Fries·N. Mahnke·E. Stein
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Abstract

We present the first systematic study of higher-twist light-cone distribution amplitudes of the nucleon in QCD. We find that the valence three-quark state is described at small transverse separations by eight independent distribution amplitudes. One of them is leading twist-3, three distributions are twist-4 and twist-5, respectively, and one is twist-6. A complete set of distribution amplitudes is constructed, which satisfies equations of motion and constraints that follow from conformal expansion. Nonperturbative input parameters are estimated from QCD sum rules.

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V. Braun, R. J. Fries, N. Mahnke, E. Stein. 2000-12-21. Higher Twist Distribution Amplitudes of the Nucleon in QCD. https://doi.org/10.1016/s0550-3213(00)00516-2

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