Dijet event rates in deep inelastic scattering at HERA
Collaboration
22 pages
Published in:
- Eur.Phys.J.C 13 (2000) 415-426
e-Print:
- hep-ex/9806029 [hep-ex]
Report number:
- DESY-98-076
Experiments:
Citations per year
Abstract:
Di-jet event rates have been measured for deep-inelastic scattering in the kinematic domain ~5 < Q^2 < ~100 GeV^2 and ~10^(-4) < x_Bj < ~10^(-2), and for jet transverse momenta squared p_t^2 > ~Q^2. The analysis is based on data collected with the H1 detector at HERA in 1994 corresponding to an integrated luminosity of about 2 pb^(-1). Jets are defined using a cone algorithm in the photon-proton centre of mass system requiring jet transverse momenta of at least 5 GeV. The di-jet event rates are shown as a function of Q^2 and x_Bj. Leading order models of point-like interacting photons fail to describe the data. Models which add resolved interacting photons or which implement the colour dipole model give a good description of the di-jet event rate. This is also the case for next-to-leading order calculations including contributions from direct and resolved photons.Note:
- 22 pages, 5 figures, 1 table, submitted to Eur. Phys. J., corrected author list Report-no: DESY 98-076
- positron p: colliding beams
- positron p: deep inelastic scattering
- small-x
- jet: pair production
- yield: (2jet)
- transverse energy: energy flow
- dependence: momentum transfer
- transverse momentum: high
- x-dependence
- quantum chromodynamics: perturbation theory
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