Diffractive dijet production at HERA
arXiv:hep-ex/9808013 · doi:10.1007/s100529801046
Abstract
Interactions of the type ep -> eXY are studied, where the component X of the hadronic final state contains two jets and is well separated in rapidity from a leading baryonic system Y. Analyses are performed of both resolved and direct photoproduction and of deep-inelastic scattering with photon virtualities in the range 7.5 < Q^2 < 80 GeV^2. Cross sections are presented where Y has mass M_Y < 1.6 GeV, the squared four-momentum transferred at the proton vertex satisfies |t| < 1 GeV^2 and the two jets each have transverse momentum p^jet_T > 5 GeV relative to the photon direction in the rest frame of X. Models based on a factorisable diffractive exchange with a gluon dominated structure, evolved to a scale set by the transverse momentum p^hat_T of the outgoing partons from the hard interaction, give good descriptions of the data. Exclusive qqbar production, as calculated in perturbative QCD using the squared proton gluon density, represents at most a small fraction of the measured cross section. The compatibility of the data with a breaking of diffractive factorisation due to spectator interactions in resolved photoproduction is investigated.
27 pages, 6 figures, 2 tables, submitted to Eur. Phys. J
References in corpus (5)
- Inclusive Measurement of Diffractive Deep-inelastic ep Scattering
- Measurement of the Diffractive Structure Function F_2^D(4) at HERA
- Measurement of the Inclusive Di-Jet Cross Section in Photoproduction and Determination of an Effective Parton Distribution in the Photon
- Thrust Jet Analysis of Deep-Inelastic Large-Rapidity-Gap Events
- Study of Photon Dissociation in Diffractive Photoproduction at HERA
Cited by in corpus (30)
- Measurement and QCD Analysis of the Diffractive Deep-Inelastic Scattering Cross Section at HERA
- Dijet Cross Sections and Parton Densities in Diffractive DIS at HERA
- HERA Collider Physics
- Tests of QCD Factorisation in the Diffractive Production of Dijets in Deep-Inelastic Scattering and Photoproduction at HERA
- Unitarity effects in hard diffraction at HERA
- An Evidence of Mass Dependent Differential Kinetic Freeze-out Scenario Observed in Pb-Pb Collisions at 2.76 TeV
- Diffractive Open Charm Production in Deep-Inelastic Scattering and Photoproduction at HERA
- Diffractive Dijet Photoproduction in ep Collisions at HERA
- Exclusive photoproduction of hard dijets and magnetic susceptibility of QCD vacuum
- Hard Single Diffraction in pbarp Collisions at root-s = 630 and 1800 GeV
- Hard diffraction in photoproduction with Pythia 8
- Review of High Energy Diffraction in Real and Virtual Photon Proton scattering at HERA
- Photoproduction with a Leading Proton at HERA
- Exclusive diffractive electroproduction of dijets in collinear factorization
- Observation of Diffractively Produced W and Z Bosons in pbar-p Collisions at root-s = 1800 GeV
- D* Meson Production in Deep-Inelastic Diffractive Interactions at HERA
- Diffractive Hadroproduction of Dijets and W's at the Tevatron Collider and the Pomeron Structure Function
- Three-jet production in diffractive deep inelastic scattering at HERA
- Diffractive Dijet Production
- Measurement of groomed event shape observables in deep-inelastic electron-proton scattering at HERA
- The compatibility of diffractive hard scattering in p pbar and ep collisions
- Diffractive Photoproduction in the Framework of Fracture Functions
- Diffractive Interactions at DIS99: Experimental Summary
- Spin effects in diffractive production at BNL eRHIC
- Low x and diffraction: theory
- Regge Analysis of Diffractive and Leading Baryon Structure Functions from DIS
- Recent Low x and Diffractive Collider Data
- Exclusive production of dijets in QCD
- Diffractive Physics at HERA
- Deep inelastic diffractive scattering at HERA