Higher twist and transverse momentum dependent parton distributions: a light-front hamiltonian approach

Details Higher twist and transverse momentum dependent parton distributions: a light-front hamiltonian approach Higher twist and transverse momentum dependent parton distributions: a light-front hamiltonian approach

2001-07-06

arxiv.org/abs/hep-ph/0107073v1

Phys.Rev. D65 (2002) 014009

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, REVTeX

Scientific paper

10.1103/PhysRevD.65.014009

In order to study twist-3 and transverse momentum dependent parton distributions, we use light-front time-ordered pQCD at order $\alpha_s$ to calculate various distribution functions for a dressed quark target. This study enables us to investigate in detail the existing relations between twist-3 and transverse momentum dependent parton distributions. Our calculation shows explicitly that two versions of such relations, considered to be equivalent, occur in the literature which need to be distinguished. Moreover, we examine sum rules for higher twist distributions. While the Burkhardt-Cottingham sum rule for $g_2$ is fulfilled, the corresponding sum rule for $h_2$ is violated.

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