Measurement of Di-jet Cross-Sections in Photoproduction and Photon Structure
arXiv:hep-ex/0003011 · doi:10.1016/S0370-2693(00)00576-1
Abstract
The production of hard di-jet events in photoproduction at HERA is dominated by resolved photon processes in which a parton in the photon with momentum fraction x_gamma is scattered from a parton in the proton. These processes are sensitive to the quark and gluon content of the photon. The differential di-jet cross-section dsigma/dlog(x_gamma) is presented here, measured in tagged photoproduction at HERA using data taken with the H1 detector, corresponding to an integrated luminosity of 7.2 pb^(-1). Using a restricted data sample at high transverse jet energy, E_(T,jet)>6 GeV, the effective parton density f_gamma,eff(x_gamma) = [q(x_gamma) + bar(q)(x_gamma) +9/4g(x_gamma)] in the photon in leading order QCD is measured down to x_gamma=0.05 from which the gluon density in the photon is derived.
19 pages, 5 figures and 2 tables
References in corpus (3)
Cited by in corpus (18)
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- The Hadronic Final State at HERA
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- Factorization breaking in diffractive dijet photoproduction at HERA
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- High Energy Photoproduction
- Proton-proton interaction in constituent quarks model at LHC energies
- CJK- Improved LO Parton Distributions in the Real Photon and Their Experimental Uncertainties
- Photon Structure and Quantum Fluctuation