Twist-4 effects and Q2 dependence of diffractive DIS
M. Bertini, M. Genovese, N. N. Nikolaev, A. V. Pronyaev, B. G. Zakharov
Abstract
In this letter we report the direct perturbative QCD evaluation of twist-4 effects in diffractive DIS. They are large and have a strong impact on the Q2 dependence of diffractive structure functions at large β. Based on the AGK rules, we comment on the possible contribution from diffractive higher twists to 1 Q2 corrections to proton structure function at small x. These corrections to the longitudinal structure function FL may be particularly large.
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