Non-factorized genuine twist 3 in exclusive electro-production of vector mesons
I. V. Anikin, O. V. Teryaev
Abstract
We present an analysis of genuine twist-3 quark contributions to the amplitude of exclusive electro-production of transversely polarized vector mesons. Using the formalism based on the momentum representation we calculated all the genuine twist-3 terms of quark contributions to gammaT* --> rhoT amplitude. We found that these terms can not be factorized owing to the existence of the infrared divergencies in the amplitude of hard sub-processes.
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