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

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

13 pages LaTeX including 4 PS figures

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Cited by in corpus (14)

• HERA Collider Physics
• Study of deep inelastic inclusive and diffractive scattering with the ZEUS forward plug calorimeter
• Anatomy of the differential gluon structure function of the proton from the experimental data on F_2p
• Unintegrated gluon distributions from the color dipole cross section in the BGK saturation model
• QCD Analysis of Diffractive and Leading-Proton DIS Structure Functions in the Framework of Fracture Functions
• Mapping the proton unintegrated gluon distribution in dijets correlations in real and virtual photoproduction at HERA
• Azimuthal asymmetry as a new handle on ${\sigma }_L/{\sigma }_T$ in diffractive DIS
• The Hard and Soft Contributions in Diffraction: A Closer Look
• Predictions for the forward cone in diffractive DIS
• The Logarithmic Slope in Diffractive DIS
• A Parametrisation of the Inclusive Diffractive Cross Section at HERA
• Diffraction driven steep rise of spin structure function $g_{LT}=g_1+g_2$ at small x and DIS sum rules
• Measurement of the diffractive structure function $F_2^{D(3)}$
• Diffraction in Charged Current DIS