Lorentz invariance relations and Wandzura-Wilczek approximation

Details Lorentz invariance relations and Wandzura-Wilczek approximation Lorentz invariance relations and Wandzura-Wilczek approximation

2009-10-14

arxiv.org/abs/0910.2567v1

Mod.Phys.Lett.A24:2950-2959,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages; Proceedings of the workshop "Recent Advances in Perturbative QCD and Hadronic Physics", July 20-24, 2009, at ECT*, T

Scientific paper

10.1142/S0217732309001169

A complete list of the so-called Lorentz invariance relations between parton distribution functions is given and some of their consequences are discussed, such as the Burkhardt-Cottingham sum rule. The violation of these relations is considered in a model independent way. It is shown that several Lorentz invariance relations are not violated in a generalized Wandzura-Wilczek approximation, indicating that numerically their violation may be small.

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