High-E{sub T} dijet photoproduction at HERA

Journal Article · Mon Oct 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.072011· OSTI ID:21032312

The cross section for high-E{sub T} dijet production in photoproduction has been measured with the ZEUS detector at HERA using an integrated luminosity of 81.8 pb{sup -1}. The events were required to have a virtuality of the incoming photon, Q{sup 2}, of less than 1 GeV{sup 2} and a photon-proton center-of-mass energy in the range 142<W{sub {gamma}}{sub p}<293 GeV. Events were selected if at least two jets satisfied the transverse-energy requirements of E{sub T}{sup jet1}>20 GeV and E{sub T}{sup jet2}>15 GeV and pseudorapidity (with respect to the proton beam direction) requirements of -1<{eta}{sup jet1,2}<3, with at least one of the jets satisfying -1<{eta}{sup jet}<2.5. The measurements show sensitivity to the parton distributions in the photon and proton and to effects beyond next-to-leading order in QCD. Hence these data can be used to constrain further the parton densities in the proton and photon.

• OSTI ID: 21032312
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
DISTRIBUTION
FOUR MOMENTUM TRANSFER
GEV RANGE
HERA STORAGE RING
JET MODEL
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE RAPIDITY
PHOTON-PROTON INTERACTIONS
PHOTONS
PHOTOPRODUCTION
PROTON BEAMS
PROTONS
QUANTUM CHROMODYNAMICS
SENSITIVITY
TRANSVERSE ENERGY