Lorentz invariance relations between parton distributions and the Wandzura–Wilczek approximation

2008/10/31 by Andreas Metz, A. Metz, P. Schweitzer +1 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1016/j.physletb.2009.08.052

published as Phys.Lett.B680:141-147,2009 · 13 pages, added references, minor changes, to appear in Phys. Lett. B

openalex publication_date 2009/08/29 · arxiv created 2009/09/02 · arxiv updated 2010/04/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

The violation of the so-called Lorentz invariance relations between parton distribution functions is considered in a model independent way. It is shown that these relations are not violated in a generalized Wandzura–Wilczek approximation, indicating that numerically their violation may be small.

Citations

• Twist-3 in Proton Nucleon Single Spin Asymmetries
• Precision measurement of the proton and deuteron spin structure functions g2 and asymmetries A2
• Leading-order analysis of the twist-3 space- and time-like cut vertices in QCD
• Transverse momentum dependent distribution functions in a covariant parton model approach with quark orbital motion
• Modelling quark distribution and fragmentation functions
• Polarized twist-three distributions g_T and h_L and the role of intrinsic transverse momentum
• HERMES measurements of Collins and Sivers asymmetries from a transversely polarised hydrogen target

Cited by

• LORENTZ INVARIANCE RELATIONS AND WANDZURA–WILCZEK APPROXIMATION
• Importance of Lorentz structure in the parton model: Target mass corrections, transverse momentum dependence, positivity bounds