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Recent measurements of the diffractive cross section in deep-inelastic scattering at HERA are presented. The data are used to investigate the factorisation properties of diffractive DIS and to examine its quantum chromodynamic structure.…

High Energy Physics - Experiment · Physics 2007-05-23 Paul Newman

The basic concepts and predictions of the `dynamical' GRV parton distributions for hadrons and photons are discussed. Comparisons of these predictions with recent experimental results, especially from HERA, are presented.

High Energy Physics - Phenomenology · Physics 2008-02-03 A. Vogt

Photon diffractive dissociation, $\gamma p \to Xp$, has been studied at HERA with the ZEUS detector using $ep$ interactions where the virtuality $Q^2$ of the exchanged photon is smaller than 0.02 GeV$^2$. The squared four-momentum $t$…

High Energy Physics - Experiment · Physics 2012-08-27 ZEUS Collaboration

Characteristics of hadron production in diffractive deep-inelastic positron-proton scattering are studied using data collected in 1994 by the H1 experiment at HERA. The following distributions are measured in the centre-of-mass frame of the…

High Energy Physics - Experiment · Physics 2008-11-26 C. Adloff

We use the Kovchegov-Levin equation to resum contributions of large invariant mass diffractive final states to diffractive structure functions in the dipole picture of deep inelastic scattering. For protons we use a (modified)…

High Energy Physics - Phenomenology · Physics 2023-08-01 Tuomas Lappi , Anh Dung Le , Heikki Mäntysaari

The proton diffractive structure function $F_2^{D(3)}$ measured in the H1 and ZEUS experiments at HERA is analyzed in terms of both Regge phenomenology and perturbative QCD evolution. A new method determines the values of the Regge…

High Energy Physics - Phenomenology · Physics 2010-03-25 C. Royon , L. Schoeffel , J. Bartels , H. Jung , R. Peschanski

The cross section for the diffractive deep-inelastic scattering process ep -> e X p is measured, with the leading final state proton detected in the H1 Forward Proton Spectrometer. The data sample covers the range x_pom<0.1 in fractional…

High Energy Physics - Experiment · Physics 2012-08-27 H1 Collaboration

The feasibility of measuring parton distribution functions of of virtual photons via the jet production at HERA is investigated.

High Energy Physics - Phenomenology · Physics 2007-05-23 J. Chyla , J. Cvach

Diffractive deeply inelastic scattering from a hadron is described in terms of diffractive quark and gluon distributions. If the transverse size of the hadronic state is sufficiently small, these distributions are calculable using…

High Energy Physics - Phenomenology · Physics 2009-10-31 F. Hautmann , Z. Kunszt , D. E. Soper

The proton diffractive structure function $F_2^{D(3)}$ measured in the H1 and ZEUS experiments at HERA are analysed in terms of perturbative QCD in the perspective of the QCD extrapolation to the Tevatron and the LHC. It is shown that both…

High Energy Physics - Phenomenology · Physics 2010-03-25 C. Royon , L. Schoeffel , R. Peschanski , E. Sauvan

Spin-1 hadrons contain different aspects of spin physics from the ones of the spin-1/2 nucleon because of the existence of tensor-polarized structure functions. In the charged-lepton deep inelastic scattering from a spin-1 hadron or…

High Energy Physics - Phenomenology · Physics 2026-01-27 S. Kumano

Production of D*+/-(2010) mesons in diffractive deep inelastic scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 82 pb^{-1}. Diffractive events were identified by the presence of a large rapidity…

High Energy Physics - Experiment · Physics 2008-11-26 ZEUS Collaboration , S. Chekanov

Recently, there have been some interesting developments involving off-forward parton distributions of the nucleon, deeply virtual Compton scattering, and hard diffractive vector-meson production. These developments are triggered by the…

High Energy Physics - Phenomenology · Physics 2008-11-26 Xiangdong Ji

Recent measurements of diffractive dijet and charm quark production in electron-proton collisions using the H1 detector at HERA are presented, where the exchanged photon is either almost real or highly virtual. The data are compared with…

High Energy Physics - Experiment · Physics 2011-09-13 Frank-Peter Schilling

The diffractive dissociation of virtual photons, gamma*p -> Xp, has been studied in ep interactions at HERA with the H1 and ZEUS detectors. The data are presented in terms of the diffractive structure function F2D and of the diffractive…

High Energy Physics - Experiment · Physics 2019-08-14 Marta Ruspa

We employ a parameterisation of the proton dipole cross section previously extracted from electroproduction and photoproduction data to predict the diffractive structure function F2D(3)(Q^2, beta, xpom). Comparison with HERA H1 data yields…

High Energy Physics - Phenomenology · Physics 2008-11-26 J. R. Forshaw , G. R. Kerley , G. Shaw

Twist-2 components of the real and virtual photon distribution amplitudes are evaluated in several chiral quark models. The results, obtained at the quark model scale, are then evolved to higher scales, probed in experiments or in lattice…

High Energy Physics - Phenomenology · Physics 2009-08-01 Wojciech Broniowski , Alexandr E. Dorokhov , Enrique Ruiz Arriola

This paper presents an analysis of the inclusive properties of diffractive deep inelastic scattering events produced in $ep$ interactions at HERA. The events are characterised by a rapidity gap between the outgoing proton system and the…

High Energy Physics - Experiment · Physics 2012-08-27 ZEUS Collaboration

In this review, we first discuss the perspectives concerning a better determination of the proton structure in terms of quarks and gluons at LHC after describing the results coming from HERA and Tevatron. In a second part of the review, we…

High Energy Physics - Phenomenology · Physics 2012-07-04 M. Boonekamp , F. Chevallier , C. Royon , L. Schoeffel

We study a twist decomposition of diffractive structure functions in the diffractive deep inelastic scattering at HERA. At low $Q^2$ and at large energy the data exhibit a strong deviation from the twist-2 NLO DGLAP description. It is found…

High Energy Physics - Phenomenology · Physics 2012-05-29 M. Sadzikowski , L. Motyka , W. Slominski