Deep inelastic prompt photon production at HERA in the k{sub T}-factorization approach

Journal Article · Sat May 01 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.094034· OSTI ID:21409956

Baranov, S P ^[1]; Lipatov, A V; Zotov, N P ^[2]

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1. P. N. Lebedev Physics Institute, 119991 Moscow (Russian Federation)
2. D. V. Skobeltsyn Institute of Nuclear Physics, M. V. Lomonosov Moscow State University, 119991 Moscow (Russian Federation)

We investigate the prompt photon production in deep inelastic scattering at HERA in the framework of the k{sub T}-factorization QCD approach. Our study is based on the off-shell partonic amplitude eq*{yields}e{gamma}q, where the photon radiation from the leptons as well as from the quarks is taken into account. The unintegrated quark densities in a proton are determined using the Kimber-Martin-Ryskin prescription. We investigate both inclusive and jet-associated prompt photon production rates. Our predictions are compared with the recent experimental data taken by the H1 and ZEUS Collaborations. We demonstrate that in the k{sub T}-factorization approach the contribution from the quark radiation subprocess (QQ mechanism) is enhanced as compared to the leading-order collinear approximation.

• OSTI ID: 21409956
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
APPROXIMATIONS
BARYONS
BOSONS
CALCULATION METHODS
DEEP INELASTIC SCATTERING
DENSITY
ELEMENTARY PARTICLES
FACTORIZATION
FERMIONS
FIELD THEORIES
FORECASTING
HADRONS
HERA STORAGE RING
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MULTIPARTICLE SPECTROMETERS
NUCLEONS
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTONS
PHYSICAL PROPERTIES
PROTONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
SCATTERING
SPECTROMETERS
STORAGE RINGS