Twist-4 effects and $Q^{2}$ dependence of diffractive DIS

Details Twist-4 effects and $Q^{2}$ dependence of diffractive DIS Twist-4 effects and $Q^{2}$ dependence of diffractive DIS

1997-10-30

arxiv.org/abs/hep-ph/9710547v1

Phys.Lett. B422 (1998) 238-246

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages LaTeX including 4 PS figures

Scientific paper

10.1016/S0370-2693(98)00036-7

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 $Q^2$ dependence of diffractive structure functions at large $\beta$. Based on the AGK rules, we comment on the possible contribution from diffractive higher twists to $\propto {1 \over Q^{2}}$ corrections to proton structure function at small $x$. These corrections to the longitudinal structure function $F_{L}$ may be particularly large.

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