Evolution Kernels for Light-Ray Operators: Twist 2 and Twist 3 Contributions
J. Blümlein, B. Geyer, D. Robaschik
Abstract
The general evolution kernels of the twist 2 light-ray operators for unpolarized and polarized deep inelastic scattering are calculated in O(αs). From these evolution kernels a series of special evolution equations can be derived, among them the Altarelli-Parisi equations and the evolution equation for the meson wave function. In the case of twist 3 the results of Balitzki and Braun are confirmed.
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