Deep Inelastic Processes and the Equations of Motion

Details Deep Inelastic Processes and the Equations of Motion Deep Inelastic Processes and the Equations of Motion

2008-04-22

arxiv.org/abs/0804.3545v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

47 pages, 5 figures

Scientific paper

We show that the Politzer theorem on the equations of motion implies approximate constraints on the quark correlator, restricting considerably, for sufficiently large Q^2, the number of independent distribution functions that characterize the internal structure of the nucleon, and of independent fragmentation functions. This result leads us to suggesting an alternative method for determining transversity. Moreover our approach implies predictions on the Q^2-dependence of some azimuthal asymmetries, like Sivers, Qiu-Sterman and Collins asymmetry. Lastly, we discuss some implications on the Burkhardt-Cottingham and Efremov-Leader-Teryaev sum rules.

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