Photoproduction of events with rapidity gaps between jets at HERA

Abstract

The photoproduction of dijet events, where the two jets with the highest transverse energy are separated by a large gap in pseudorapidity, have been studied with the ZEUS detector using an integrated luminosity of 39 pb${}^{-1}$. Rapidity-gap events are defined in terms of the energy flow between the jets, such that the total summed transverse energy in this region is less than some value $E_{\mathrm{T}}^{\mathrm{CUT}}$. The data show a clear excess over the predictions of standard photoproduction models. This is interpreted as evidence for a strongly interacting exchange of a color-singlet object. Monte Carlo models which include such a color-singlet exchange are able to describe the data.

arXiv comment28 pages, 13 figures, accepted by EPJ C

References in corpus (18)

• Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions
• Multiparton Interactions in Photoproduction at HERA
• Sudakov Factorization and Resummation
• Threshold Resummation for Dijet Cross Sections
• Super-leading logarithms in non-global observables in QCD?
• Low- and high-mass components of the photon distribution functions
• Non-global logarithms in inter-jet energy flow with kt clustering requirement
• Problems in resumming interjet energy flows with k_t clustering
• Rapidity Gaps between Jets in Photoproduction at HERA
• Dijet photoproduction at HERA and the structure of the photon
• Energy and Color Flow in Dijet Rapidity Gaps
• Probing Hard Color-Singlet Exchange in ppbar Collisions at root-s=630 GeV and 1800 GeV
• Color Exchange in Near-forward Hard Elastic Ecattering
• Jet Production via Strongly-Interacting Color-Singlet Exchange in $p\bar{p}$ Collisions
• The resummation of inter-jet energy flow for gaps-between-jets processes at HERA
• Energy Flow and Rapidity Gaps Between Jets in Photoproduction at HERA
• JetWeb: A WWW Interface and Database for Monte Carlo Tuning and Validation
• Diffusion and the BFKL Pomeron

Cited by in corpus (10)

• On QCD resummation with kt clustering
• Measurement of dijet production with a veto on additional central jet activity in pp collisions at sqrt(s)=7 TeV using the ATLAS detector
• The Hadronic Final State at HERA
• Measurements of jet vetoes and azimuthal decorrelations in dijet events produced in $pp$ collisions at $\sqrt{s}$ = 7 TeV using the ATLAS detector
• Scaling Patterns for QCD Jets
• The dijet cross section with a jet veto
• Probing the Gauge Content of Heavy Resonances with Soft Radiation
• Measurement of Diffractive Scattering of Photons with Large Momentum Transfer at HERA
• Soft gluons and superleading logarithms in QCD
• Energy dependence of the charged multiplicity in deep inelastic scattering at HERA