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

H. Abramowicz, Iris Abt, L. Adamczyk, M. Adamus, Ritu Aggarwal, S. Antonelli, O. Arslan, V. Aushev, Y. Aushev, O. Bachynska

90 more authors

A.N. Barakbaev, N. Bartosik, O. Behnke, J. K. Behr, U. Behrens, A. Bertolin, S. Bhadra, I. Bloch, V. Bokhonov, E. Boos, K. Borras, Ian C. Brock, R. Brugnera, A. Bruni, B. Brzozowska, Peter John Bussey, Allen Caldwell, M. Capua, C. D. Catterall, J. J. Chwastowski, J. Ciborowski, R. Ciesielski, A. M. Cooper-Sarkar, M. Corradi, F. Corriveau, G. D’Agostini, R. K. Dementiev, R.C.E. Devenish, Ganna Dolinska, V. Drugakov, S. Dusini, J. Ferrando, J. Figiel, Brian Foster, G. P. Gach, A. Garfagnini, A. Geiser, A. Gizhko, L. K. Gladilin, O. Gogota, Yu. A. Golubkov, J. Grebenyuk, I. M. Gregor, Grzegorz Grzelak, O. Gueta, M. P. Guzik, W. Hain, G. Hartner, Don Hochman, R. Hori, Z. A. Ibrahim, Yoshihisa Iga, M. Ishitsuka, Andrii Iudin, F. Januschek, І. Каденко, S. Kananov, T. Kanno, Uri Karshon, M. Kaur, Prabhdeep Kaur, L. A. Khein, Danuta Kisielewska, R. Klanner, U. Klein, N. Kondrashova, O. Kononenko, Ie. Korol, I. A. Korzhavina, Andrzej Kotański, U. Kötz, N. Kovalchuk, H. Kowalski, O. Kuprash, M. Kuze, B. B. Levchenko, A. Levy, V. Libov, S. Limentani, M. Lisovyi, E. M. Lobodzinska, W. Lohmann, Bernd Löhr, Bernd Löhr, A. Longhin, D. Lontkovskyi, O.Yu. Lukina, Junpei Maeda, Inna Makarenko, J. Malka

2014

Full text Open access: Gold Metadata (CSL-JSON)
DOI 10.1016/j.physletb.2014.01.062
Data confidence 70 medium
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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 < E T γ < 15 GeV and − 0.7 < η γ < 0.9 , and for jet transverse-energy and pseudorapidity ranges 4 < E T jet < 35 GeV and − 1.5 < η jet < 1.8 , for exchanged-photon virtualities Q 2 < 1 GeV 2 . 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.