Inclusive jet cross sections and dijet correlations in $D^{\ast \pm }$ photoproduction at HERA

Abstract

Inclusive jet cross sections in photoproduction for events containing a $D^{\ast }$ meson have been measured with the ZEUS detector at HERA using an integrated luminosity of $78.6{\mathrm{pb}}^{-1}$. The events were required to have a virtuality of the incoming photon, $Q^2$, of less than 1 GeV${}^2$, and a photon-proton centre-of-mass energy in the range $130<W_{\gamma p}<280\mathrm{GeV}$. The measurements are compared with next-to-leading-order (NLO) QCD calculations. Good agreement is found with the NLO calculations over most of the measured kinematic region. Requiring a second jet in the event allowed a more detailed comparison with QCD calculations. The measured dijet cross sections are also compared to Monte Carlo (MC) models which incorporate leading-order matrix elements followed by parton showers and hadronisation. The NLO QCD predictions are in general agreement with the data although differences have been isolated to regions where contributions from higher orders are expected to be significant. The MC models give a better description than the NLO predictions of the shape of the measured cross sections.

43 pages, 12 figures, charm jets ZEUS

References in corpus (21)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• High-Energy-Physics Event Generation with PYTHIA 6.1
• Matching NLO QCD computations and parton shower simulations
• Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions
• Successive Combination Jet Algorithm For Hadron Collisions
• Matching NLO QCD and parton showers in heavy flavour production
• MRST2001: partons and alpha_S from precise deep inelastic scattering and Tevatron jet data
• Jet photoproduction at HERA
• Parton Distributions in the Photon
• Total Cross Sections for Heavy Flavour Production at HERA
• Differential Distributions for Heavy Flavour Production at HERA
• A Phenomenological Study of Heavy-Quark Fragmentation Functions in e+e- Annihilation
• Dijet Cross Sections in Photoproduction at HERA
• Predictions for D^*+- Photoproduction at HERA with New Fragmentation Functions from LEP1
• Large-p_T Photoproduction of D^*+- Mesons in ep Collisions
• Measurement of f(c -> D^*+ X), f(b -> D^*+ X) and Gamma_cc(bar)/Gamma_had using D^*+/- Mesons
• Bottom Quark Fragmentation in Top Quark Decay
• Measurement of inclusive D*+- and associated dijet cross sections in photoproduction at HERA
• Dijet angular distributions in photoproduction of charm at HERA
• Next-to-leading-order predictions for D^{*+-} plus jet photoproduction at DESY HERA
• Update of MRST partons

Cited by in corpus (19)

• Small x Phenomenology - summary of the 3rd Lund Small x Workshop in 2004
• The Hadronic Final State at HERA
• Collider Physics at HERA
• Production of D* Mesons with Dijets in Deep-Inelastic Scattering at HERA
• Measurement of Charm and Beauty Dijet Cross Sections in Photoproduction at HERA using the H1 Vertex Detector
• Beauty photoproduction using decays into electrons at HERA
• Measurement of open beauty production at HERA in the D* muon final state
• Measurement of beauty production from dimuon events at HERA
• Measurement of beauty photoproduction using decays into muons in dijet events at HERA
• High-E_T dijet photoproduction at HERA
• Measurement of heavy-quark jet photoproduction at HERA
• Inclusive D* Meson Cross Sections and D* Jet Correlations in Photoproduction at HERA
• Measurement of Inclusive and Dijet D* Meson Cross Sections in Photoproduction at HERA
• Charm and bottom photoproduction at HERA with MC@NLO
• Measurement of D*+- meson production in ep scattering at low Q^2
• D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c
• Charm photoproduction at HERA: kt-factorization versus experimental data
• Dijet photoproduction of massless charm jets at next-to-leading order of QCD
• Unintegrated gluon distributions in D* and dijet associated photoproduction at HERA