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After new publications of H1 data for the diffractive photoproduction of dijets, which overlap with the earlier published H1 data and the recently published data of the ZEUS collaboration, have appeared, we have recalculated the cross…

High Energy Physics - Phenomenology · Physics 2011-02-09 M. Klasen , G. Kramer

When comparing recent experimental data from the H1 and ZEUS Collaborations at HERA for diffractive dijet production in deep-inelastic scattering (DIS) and photoproduction with next-to-leading order (NLO) QCD predictions using diffractive…

High Energy Physics - Phenomenology · Physics 2017-08-23 M. Klasen

We have calculated the diffractive dijet cross section in low-Q^2 ep scattering in the HERA regime. The results of the calculation in LO and NLO are compared to recent experimental data of the H1 collaboration. We find that in LO the…

High Energy Physics - Phenomenology · Physics 2009-11-10 M. Klasen , G. Kramer

We have calculated the diffractive dijet cross section in low-Q^2 ep scattering in the HERA regime. The results of the calculation in LO and NLO are compared to recent experimental data of the H1 collaboration. We find that in LO the…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Klasen , G. Kramer

We calculate the cross section of diffractive dijet photoproduction in $ep$ scattering at next-to-leading order (NLO) of perturbative QCD (pQCD), which we supplement by a model of factorization breaking for the resolved-photon contribution.…

High Energy Physics - Phenomenology · Physics 2016-09-21 V. Guzey , M. Klasen

We present recent experimental data from the H1 and ZEUS Collaborations at HERA for diffractive dijet production in deep-inelastic scattering (DIS) and photoproduction and compare them with next-to-leading order (NLO) QCD predictions using…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. Bruni , M. Klasen , G. Kramer , S. Schatzel

We discuss the factorization breaking observed in diffractive dijet photoproduction by the H1 and ZEUS collaborations at HERA. By considering the effects of rapidity gap survival, hadronisation, migration and NLO contributions, we find that…

High Energy Physics - Phenomenology · Physics 2014-11-20 A. B. Kaidalov , V. A. Khoze , A. D. Martin , M. G. Ryskin

Recent experimental data on dijet cross sections in diffractive photoproduction at HERA collider are analysed with an emphasis on QCD factorisation breaking effects. The possible sources of the contradiction in conclusions of H1 and ZEUS…

High Energy Physics - Phenomenology · Physics 2011-09-30 Radek Žlebčík , Karel Černý , Alice Valkárová

The production of dijets with a leading neutron in ep-interactions at HERA is calculated in leading order and next-to-leading order of perturbative QCD using a pion-exchange model. Differential cross sections for deep-inelastic scattering…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Klasen , G. Kramer

We calculate diffractive dijet production in deep-inelastic scattering at next-to-leading order of perturbative QCD, including contributions from direct and resolved photons, and compare our predictions to preliminary data from the H1…

High Energy Physics - Phenomenology · Physics 2009-11-10 M. Klasen , G. Kramer

We have calculated diffractive dijet production in deep-inelastic scattering (DIS) at low-Q^2 and next-to-leading order (NLO) of perturbative QCD, including contributions from direct and resolved photons. We study how the cross section…

High Energy Physics - Phenomenology · Physics 2015-06-25 M. Klasen , G. Kramer

We confront the latest H1 and ZEUS data on diffractive dijet photoproduction with next-to-leading order QCD predictions in order to determine whether a rapidity gap survival probability of less than one is supported by the data. We find…

High Energy Physics - Phenomenology · Physics 2008-08-28 M. Klasen , G. Kramer

We calculate diffractive dijet production in deep-inelastic scattering at next-to-leading order of perturbative QCD, including contributions from direct and resolved photons, and compare our predictions to preliminary data from the H1…

High Energy Physics - Phenomenology · Physics 2014-11-18 M. Klasen , G. Kramer

Recent results from ZEUS for inclusive jet cross sections, dijet cross sections and dijet angular distributions are compared with NLO perturbative QCD calculations. The observation of isolated high $P_T$ photons (prompt photons) is also…

High Energy Physics - Experiment · Physics 2009-10-30 R. L. Saunders

Recent data on diffractive photoproduction of dijets are analyzed within the framework of fracture functions and paying special attention to the consequences of the use of different rapidity gap definitions in order to identify diffractive…

High Energy Physics - Phenomenology · Physics 2009-10-31 Rodolfo Sassot

We make predictions for the cross sections of diffractive dijet photoproduction in $pp$, $pA$ and $AA$ ultraperipheral collisions (UPCs) at the LHC during Runs 1 and 2 using next-to-leading perturbative QCD. We find that the resulting cross…

High Energy Physics - Phenomenology · Physics 2016-05-25 V. Guzey , M. Klasen

The H1 and Zeus collaborations have measured the inclusive diffractive DIS cross section ep -> eXp and these measurements are in good agreement within a normalisation uncertainty. Diffractive parton density functions (DPDFs) have been…

High Energy Physics - Experiment · Physics 2009-06-09 Paul Laycock

We study inclusive photoproduction of hadrons at HERA via both direct and resolved photons to next-to-leading order (NLO) in the QCD-improved parton model. We predict transverse-momentum ($\pt$) and rapidity ($\ylab$) distributions and…

High Energy Physics - Phenomenology · Physics 2007-05-23 Bernd A. Kniehl

Hard processes in diffractive deep-inelastic scattering can be described by a factorisation into parton-level subprocesses and diffractive parton distributions. In this framework, cross sections for inclusive dijet production in diffractive…

High Energy Physics - Phenomenology · Physics 2018-08-01 D. Britzger , J. Currie , T. Gehrmann , A. Huss , J. Niehues , R. Žlebčík

A new next-to-leading order Monte Carlo program for the calculation of fully differential jet cross sections in photoproduction is described. The contributions from both resolved and direct components are included. A comparison between the…

High Energy Physics - Phenomenology · Physics 2007-05-23 B. W. Harris , J. F. Owens
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