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Paper detail

Lorentz invariance relations and Wandzura-Wilczek approximation

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.

preprint2009arXivOpen access
T. TeckentrupA. MetzP. Schweitzer
hep-ph
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T. TeckentrupA. MetzP. Schweitzer

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