Abramowicz, H;
Abt, I;
Adamczyk, L;
Adamus, M;
Antonelli, S;
Aushev, V;
Aushev, Y;
... Zhautykov, BO; + view all
(2017)
Studies of the diffractive photoproduction of isolated photons at HERA.
Phys. Rev. D
, 96
(3)
, Article 032006. 10.1103/PhysRevD.96.032006.
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Abstract
The photoproduction of isolated photons has been measured in diffractive events recorded by the ZEUS detector at HERA. Cross sections are evaluated in the photon transverse-energy and pseudorapidity ranges 5 < Eγ T < 15 GeV and −0.7 < ηγ < 0.9, inclusively, and also with a jet with transverse energy and pseudorapidity in the ranges 4 < Ejet T < 35 GeV and −1.5 < ηjet < 1.8, using a total integrated electronproton luminosity of 456 pb−1. A number of kinematic variables were studied and compared to predictions from the RAPGAP Monte Carlo model. An excess of data is observed above the RAPGAP predictions for zmeas P > 0.9, where zmeas P is the fraction of the longitudinal momentum of the colorless “Pomeron” exchange that is transferred to the photon-jet final state, giving evidence for direct Pomeron interactions.
| Type: | Article |
|---|---|
| Title: | Studies of the diffractive photoproduction of isolated photons at HERA |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.96.032006 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.96.032006 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Particles & Fields, Physics, Deep-Inelastic-Scattering, Central Tracking Detector, Zeus Barrel Calorimeter, Color Dipole Model, E-T Photons, Parton Distributions, EP Collisions, Hadron-Collisions, Prompt Photons, Rapidity Gaps |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1576108 |
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