Genuine twist 3 in exclusive electroproduction of transversely polarized vector mesons

Details Genuine twist 3 in exclusive electroproduction of transversely polarized vector mesons Genuine twist 3 in exclusive electroproduction of transversely polarized vector mesons

2002-11-04

arxiv.org/abs/hep-ph/0211028v2

Phys.Lett. B554 (2003) 51-63

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 6 ps. figures

Scientific paper

10.1016/S0370-2693(02)03195-7

We present the detailed analysis of genuine twist-3 contributions to the exclusive electroproduction amplitude of transversely polarized vector mesons. Using the formalism based on the QCD factorization in the momentum representation we calculated all the genuine twist-3 terms and found the total expression of this amplitude at 1/Q level. Generally speaking, these terms violate standard factorization owing to the existence of the infrared divergencies in the amplitude of hard sub-processes, although the strongest divergencies cancel due to the QCD equations of motion. We discuss the possible treatment of surviving divergencies.

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