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Diffractive parton distributions from the saturation model
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We review diffractive deep inelastic scattering (DIS) in the light of the collinear factorization theorem. This theorem allows to define diffractive parton distributions in the leading twist approach. Due to its selective final states, diffractive DIS offers interesting insight into the form of the diffractive parton distributions which we explore with the help of the saturation model. We find Regge-like factorization with the correct energy dependence measured at HERA. A remarkable feature of diffractive DIS is the dominance of the twist-4 contribution for small diffractive masses. We quantify this effect and make a comparison with the data.
Forward citations
Cited by 3 Pith papers
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Diffractive deep inelastic scattering in the dipole picture: the $q\bar{q}g$ contribution in exact kinematics
Exact q qbar g contribution to diffractive DIS structure functions in the dipole model shows prior high-Q2 and high-MX2 approximations are inadequate and that soft quark terms are comparably important at high Q2.
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Parton distributions in the shockwave formalism
A single shockwave Feynman-rule framework reproduces and extends prior small-x parton distributions, yielding new quark GTMD/GPD/PDF and diffractive-TMD results.
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Role of higher twist effects in diffractive DIS and determination of diffractive parton distribution functions
A next-to-leading order fit to HERA diffractive DIS data that includes a fitted 1/Q^2 higher-twist term improves chi2/dof from 1.052 to 1.013 and changes the extracted gluon density, though the effect is not shown to ...
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