gamma* -> rhoT impact factor with twist three accuracy

I.V. Anikin , D.Yu. Ivanov , B. Pire , L. Szymanowski , S. Wallon

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classification ✦ hep-ph

keywords factorgammaimpactrhottwistaccountaccuracyconsistent

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We evaluate the impact factor of the transition gamma* -> rhoT taking into account the twist 3 contributions. We show that a gauge invariant expression is obtained with the help of QCD equations of motion. Our results are free of end-point singularities. This opens the way to a consistent treatment of factorization for exclusive processes with a transversally polarized vector meson.

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gamma* -> rhoT impact factor with twist three accuracy

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