Prompt photon photoproduction at HERA within the framework of the quark Reggeization hypothesis
arXiv:0812.0946 · doi:10.1103/PhysRevD.78.114031
Abstract
We study the inclusive production of isolated prompt photons within the framework of the quasi-multi-Regge-kinematic approach, applying the quark Reggeization hypothesis. We describe accurately and without free parameters the transverse momentum and pseudorapidity spectra of prompt photons in the inclusive photoproduction at the HERA Collider. It is shown that the main mechanism of the inclusive prompt photon production in the gamma p collisions is the fusion of a Reggeized quark (antiquark) from the proton and a collinear antiquark (quark) from the photon into a photon, via the effective Reggeon-quark-gamma vertex. The fragmentation of the quark, which is produced via the gamma-Reggeon-quark and quark-Reggeon-quark vertices, into a photon is strongly suppressed by the isolation cone condition and it gives a significant contribution in the region of a large negative pseudorapidity only. At the stage of numerical calculations we use the Kimber-Martin-Ryskin prescription for unintegrated quark and gluon distribution functions, with the following collinear parton densities as input: MRST for a proton and GRV for a photon.
arXiv comment12 pages, 4 figures
References in corpus (18)
- Unintegrated parton distributions
- NNLO global parton analysis
- Gauge invariant effective action for high-energy processes in QCD
- Next-to-leading Corrections to the BFKL Equation From the Gluon and Quark Production
- Feynman rules for effective Regge action
- Quasi-multi-Regge Processes with a Quark Exchange in the t-channel
- Charmonium Production at High Energy in the k_T-Factorization Approach
- A proof of the reggeized form of amplitudes with quark exchanges
- Isolated prompt photon photoproduction at NLO
- Prompt photon photoproduction at HERA in the k_T-factorization approach
- Bottomonium Production in the Regge Limit of QCD
- Measurement of inclusive prompt photon photoproduction at HERA
- NLO inclusive jet production in --factorization
- Measurement of Prompt Photon Cross Sections in Photoproduction at HERA
- Deep inelastic scattering and prompt photon production within the framework of quark Reggeization hypothesis
- Direct J/psi and psi' hadroproduction via fragmentation in the collinear parton model and k_T-factorization approach
- NLO correction to one-particle inclusive production at high energies
- Photoproduction of J/psi mesons at high energies in parton model and k_t-faktorization approach
Cited by in corpus (20)
- NLO prescription for unintegrated parton distributions
- Dijet azimuthal decorrelations at the LHC in the parton Reggeization approach
- Forward Z-boson production and the unintegrated sea quark density
- Prompt J/psi production in the Regge limit of QCD: From Tevatron to LHC
- Drell-Yan lepton pair production at high energies in the Parton Reggeization Approach
- Single jet and prompt-photon inclusive production with multi-Regge kinematics: From Tevatron to LHC
- Inclusive b and b anti-b production with quasi-multi-Regge kinematics at the Tevatron
- Inclusive b-jet and b\bar b-dijet production at the LHC via Reggeized gluons
- Prompt-photon plus jet associated photoproduction at HERA in the parton Reggeization approach
- Diphoton production at Tevatron in the quasi-multi-Regge-kinematics approach
- B-meson production in the Parton Reggeization Approach at Tevatron and the LHC
- Large-p_T production of D mesons at the LHCb in the parton Reggeization approach
- Open charm production in the parton Reggeization approach: from Tevatron to LHC
- Prompt Upsilon(nS) production at the LHC in the Regge limit of QCD
- Heavy quark production in deep inelastic electron-nucleus scattering
- A kT-dependent sea-quark density for the CASCADE Monte Carlo event generator
- Unintegrated parton distributions in nuclei
- Associated production of and direct photon in the NRQCD and the ICEM using the high-energy factorization
- Single isolated photon production in the NLO approximation of the Parton Reggeization Approach
- Prompt-photon plus jet photoproduction with ZEUS at DESY HERA in the parton Reggeization approach