Studies of the diffractive photoproduction of isolated photons at HERA
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<EγT<15 GeV and −0.7<ηγ<0.9, inclusively, and also with a jet with transverse ene...
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| Main Authors: | , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
31 August 2017
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| In: |
Physical review
Year: 2017, Volume: 96, Issue: 3 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.96.032006 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.96.032006 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.96.032006 
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| Author Notes: | ZEUS Collaboration: H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, S. Antonelli, V. Aushev, Y. Aushev, O. Behnke, U. Behrens, A. Bertolin, I. Bloch, I. Brock, N.H. Brook, R. Brugnera, A. Bruni, P.J. Bussey, A. Caldwell, M. Capua, C.D. Catterall, J. Chwastowski, J. Ciborowski, R. Ciesielski, A.M. Cooper-Sarkar, M. Corradi, R.K. Dementiev, R.C E. Devenish, S. Dusini, B. Foster, G. Gach, E. Gallo, A. Garfagnini, A. Geiser, A. Gizhko, L. K. Gladilin, Yu. A. Golubkov, G. Grzelak, M. Guzik, C. Gwenlan, O. Hlushchenko, D. Hochman, R. Hori, Z. A. Ibrahim, Y. Iga, M. Ishitsuka, N. Z. Jomhari, I. Kadenko, S. Kananov, U. Karshon, P. Kaur, D. Kisielewska, R. Klanner, U. Klein, I. A. Korzhavina, A. Kotański, N. Kovalchuk, H. Kowalski, B. Krupa, O. Kuprash, M. Kuze, B.B. Levchenko, A. Levy, M. Lisovyi, E. Lobodzinska, B. Löhr, E. Lohrmann, A. Longhin, O. Yu. Lukina, J. Malka, A. Mastroberardino, F. Mohamad Idris, N. Mohammad Nasir, V. Myronenko, K. Nagano, Yu. Onishchuk, E. Paul, W. Perlański, N. S. Pokrovskiy, A. Polini, M. Przybycień, M. Ruspa, D.H. Saxon, M. Schioppa, U. Schneekloth, T. Schörner-Sadenius, L. M. Shcheglova, O. Shkola, Yu. Shyrma, I. O. Skillicorn, W. Słomiński, A. Solano, L. Stanco, N. Stefaniuk, A. Stern, P. Stopa, J. Sztuk-Dambietz, E. Tassi, K. Tokushuku, J. Tomaszewska, T. Tsurugai, M. Turcato, O. Turkot, T. Tymieniecka, A. Verbytskyi, W. A.T. Wan Abdullah, K. Wichmann, M. Wing, S. Yamada, Y. Yamazaki, A.F. Żarnecki, L. Zawiejski, O. Zenaiev and B.O. Zhautykov |
| Summary: | 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<EγT<15 GeV and −0.7<ηγ<0.9, inclusively, and also with a jet with transverse energy and pseudorapidity in the ranges 4<EjetT<35 GeV and −1.5<ηjet<1.8, using a total integrated electron-proton 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 zmeasP>0.9, where zmeasP 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. |
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| Item Description: | Gesehen am 26.09.2018 |
| Physical Description: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.96.032006 |