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arXiv · 2011.06203

Structure of the nucleon at leading and subleading twist in the covariant parton model

S. Bastami·A. V. Efremov·P. Schweitzer·O. V. Teryaev·P. Zavada
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Abstract

The covariant parton model is generalized to describe quark correlators in a systematic way. Previous results are reproduced for the T-even leading-twist transverse momentum dependent parton distribution functions (TMDs), and for the first time all T-even twist-3 TMDs are evaluated in this model. We apply the approach to evaluate the fully unintegrated quark correlator which allows us to understand the model-specific relations between different TMDs. We verify the consistency of the approach, present numerical results and compare to available TMD parametrizations.

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S. Bastami, A. V. Efremov, P. Schweitzer, O. V. Teryaev, P. Zavada. 2020-11-12. Structure of the nucleon at leading and subleading twist in the covariant parton model. https://doi.org/10.1103/physrevd.103.014024

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