Structure of the nucleon at leading and subleading twist in the covariant parton model
S. Bastami, А. В. Ефремов, P. Schweitzer, O. V. Teryaev, P. Závada
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.
Topics & Concepts
PartonCovariant transformationPhysicsTwistParticle physicsConsistency (knowledge bases)QuarkNucleonQuark modelMathematical physicsMathematicsGeometryQuarkoniumParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research