On the description of exclusive processes beyond the leading twist approximation

Details On the description of exclusive processes beyond the leading twist approximation On the description of exclusive processes beyond the leading twist approximation

2009-03-27

arxiv.org/abs/0903.4797v2

Phys.Lett.B682:413-418,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 2 figures, modified and slightly expanded version to be published in Phys.Lett. B

Scientific paper

10.1016/j.physletb.2009.11.040

We describe hard exclusive processes beyond the leading twist approximation in a framework based on the Taylor expansion of the amplitude around the dominant light-cone directions. This naturally introduces an appropriate set of non-perturbative correlators whose number is minimalized after taking into account QCD equations of motion and the invariance under rotation on the light-cone. We examplify this method at the twist 3 level and show that the coordinate and momentum space descriptions are fully equivalent.

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