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The production of isolated high-energy photons accompanied by jets has been measured in deep inelastic ep scattering with the ZEUS detector at HERA, using an integrated luminosity of 326 pb(-1). Measurements were made for exchanged photon virtualities Q(2), in the range 10 to 350 GeV2. The photons were measured in the transverse-energy and pseudorapidity ranges 4 < E-T(gamma) < 15 GeV and -0.7 < eta(gamma) < 0.9, and the jets were measured in the transverse-energy and pseudorapidity ranges 2.5 < E-T(jet) < 35 GeV and -15< eta(jet) < 1.8. Differential cross sections are presented as functions of these quantities. Perturbative QCD predictions give a reasonable description of the shape of the measured cross sections over most of the kinematic range but the absolute normalisation is typically in disagreement by 20-30%. (c) 2012 Elsevier B.V. All rights reserved.

Measurement of isolated photons accompanied by jets in deep inelastic ep scattering / H., A., I., A., L., A., M., A., R., A., S., A., P., A., A., A., M., A., O., A., V., A., Y., A., O., B., A., B., A. N., B., G., B., G., B., F., B., N., B., D., B., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 715:(2012), pp. 88-97. [10.1016/j.physletb.2012.07.031]

Measurement of isolated photons accompanied by jets in deep inelastic ep scattering

D'AGOSTINI, Giulio;NIGRO, Andrea;
2012

Abstract

The production of isolated high-energy photons accompanied by jets has been measured in deep inelastic ep scattering with the ZEUS detector at HERA, using an integrated luminosity of 326 pb(-1). Measurements were made for exchanged photon virtualities Q(2), in the range 10 to 350 GeV2. The photons were measured in the transverse-energy and pseudorapidity ranges 4 < E-T(gamma) < 15 GeV and -0.7 < eta(gamma) < 0.9, and the jets were measured in the transverse-energy and pseudorapidity ranges 2.5 < E-T(jet) < 35 GeV and -15< eta(jet) < 1.8. Differential cross sections are presented as functions of these quantities. Perturbative QCD predictions give a reasonable description of the shape of the measured cross sections over most of the kinematic range but the absolute normalisation is typically in disagreement by 20-30%. (c) 2012 Elsevier B.V. All rights reserved.
2012
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of isolated photons accompanied by jets in deep inelastic ep scattering / H., A., I., A., L., A., M., A., R., A., S., A., P., A., A., A., M., A., O., A., V., A., Y., A., O., B., A., B., A. N., B., G., B., G., B., F., B., N., B., D., B., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 715:(2012), pp. 88-97. [10.1016/j.physletb.2012.07.031]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/495916
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