Photoproduction of isolated photons, inclusively and with a jet, at HERA

H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, R. Aggarwal, S. Antonelli, O. Arslan, V. Aushev, Y. Aushev, O. Bachynska, A. N. Barakbaev, N. Bartosik, O. Behnke, J. Behr, U. Behrens, A. Bertolin, S. Bhadra, I. Bloch, V. Bokhonov, E. G. BoosK. Borras, I. Brock, R. Brugnera, A. Bruni, B. Brzozowska, P. J. Bussey, A. Caldwell, M. Capua, C. D. Catterall, J. Chwastowski, J. Ciborowski, R. Ciesielski, A. M. Cooper-Sarkar, M. Corradi, F. Corriveau, G. D'Agostini, R. K. Dementiev, R. C.E. Devenish, G. Dolinska, V. Drugakov, S. Dusini, J. Ferrando, J. Figiel, B. Foster, G. Gach, A. Garfagnini, A. Geiser, A. Gizhko, L. K. Gladilin, O. Gogota, Yu A. Golubkov, J. Grebenyuk, I. Gregor, G. Grzelak, O. Gueta, M. Guzik, W. Hain, G. Hartner, D. Hochman, R. Hori, Z. A. Ibrahim, Y. Iga, M. Ishitsuka, A. Iudin, F. Januschek, I. Kadenko, S. Kananov, T. Kanno, U. Karshon, M. Kaur, P. Kaur, L. A. Khein, D. Kisielewska, R. Klanner, U. Klein, N. Kondrashova, O. Kononenko, Ie Korol, I. A. Korzhavina, A. Kotański, U. Kötz, N. Kovalchuk, H. Kowalski, O. Kuprash, M. Kuze, B. B. Levchenko, A. Levy, V. Libov, S. Limentani, M. Lisovyi, E. Lobodzinska, W. Lohmann, B. Löhr, E. Lohrmann, A. Longhin, D. Lontkovskyi, O. Yu Lukina, J. Maeda, I. Makarenko, J. Malka, J. F. Martin, S. Mergelmeyer, F. Mohamad Idris, K. Mujkic, V. Myronenko, K. Nagano, A. Nigro, T. Nobe, D. Notz, R. J. Nowak, K. Olkiewicz, Yu Onishchuk, E. Paul, W. Perlański, H. Perrey, N. S. Pokrovskiy, A. S. Proskuryakov, M. Przybycień, A. Raval, P. Roloff, I. Rubinsky, M. Ruspa, V. Samojlov, D. H. Saxon, M. Schioppa, W. B. Schmidke, U. Schneekloth, T. Schörner-Sadenius, J. Schwartz, L. M. Shcheglova, R. Shevchenko, O. Shkola, I. Singh, I. O. Skillicorn, W. Słomiński, V. Sola, A. Solano, A. Spiridonov, L. Stanco, N. Stefaniuk, A. Stern, T. P. Stewart, P. Stopa, J. Sztuk-Dambietz, D. Szuba, J. Szuba, E. Tassi, T. Temiraliev, K. Tokushuku, J. Tomaszewska, A. Trofymov, V. Trusov, T. Tsurugai, M. Turcato, O. Turkot, T. Tymieniecka, A. Verbytskyi, O. Viazlo, R. Walczak, W. A.T. Wan Abdullah, K. Wichmann, M. Wing*, G. Wolf, S. Yamada, Y. Yamazaki, N. Zakharchuk, A. F. Zarnecki, L. Zawiejski, O. Zenaiev, B. O. Zhautykov, N. Zhmak, D. S. Zotkin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The photoproduction of isolated photons, both inclusive and together with a jet, has been measured with the ZEUS detector at HERA using an integrated luminosity of 374 pb-1. Differential cross sections are presented in the isolated-photon transverse-energy and pseudorapidity ranges 6<ETγ<15 GeV and -0.7<ηγ<0.9, and for jet transverse-energy and pseudorapidity ranges 4<ETjet<35 GeV and -1.5<ηjet<1.8, for exchanged-photon virtualities Q2<1 GeV2. Differential cross sections are also presented for inclusive isolated-photon production as functions of the transverse energy and pseudorapidity of the photon. Higher-order theoretical calculations are compared to the results.

Original languageEnglish
Pages (from-to)293-301
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume730
DOIs
StatePublished - 7 Mar 2014

Funding

FundersFunder number
Science and Technology Facilities CouncilST/M001415/1, ST/H001026/1, ST/K001426/1, ST/K00137X/1, ST/H001026/2
Science and Technology Facilities Council

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