Studies of the diffractive photoproduction of isolated photons at HERA

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Abramowicz, H, Abt, I, Adamczyk, L, Adamus, M, Antonelli, S, Aushev, V, Aushev, Y, Behnke, O, Behrens, U, Bertolin, A et al (show 102 more authors) , Bloch, I, Brock, I, Brook, NH, Brugnera, R, Bruni, A, Bussey, PJ, Caldwell, A, Capua, M, Catterall, CD, Chwastowski, J, Ciborowski, J, Ciesielski, R, Cooper-Sarkar, AM, Corradi, M, Dementiev, RK, Devenish, RCE, Dusini, S, Foster, B, Gach, G, Gallo, E, Garfagnini, A, Geiser, A, Gizhko, A, Gladilin, LK, Golubkov, Yu A, Grzelak, G, Guzik, M, Gwenlan, C, Hlushchenko, O, Hochman, D, Hori, R, Ibrahim, ZA, Iga, Y, Ishitsuka, M, Jomhari, NZ, Kadenko, I, Kananov, S, Karshon, U, Kaur, P, Kisielewska, D, Klanner, R, Klein, U ORCID: 0000-0001-7391-5330, Korzhavina, IA, Kotanski, A, Kovalchuk, N, Kowalski, H, Krupa, B, Kuprash, O, Kuze, M, Levchenko, BB, Levy, A, Lisovyi, M, Lobodzinska, E, Loehr, B, Lohrmann, E, Longhin, A, Lukina, O Yu, Malka, J, Mastroberardino, A, Idris, F Mohamad, Nasir, N Mohammad, Myronenko, V, Nagano, K, Onishchuk, Yu, Paul, E, Perlanski, W, Pokrovskiy, NS, Polini, A, Przybycien, M, Ruspa, M, Saxon, DH, Schioppa, M, Schneekloth, U, Schoerner-Sadenius, T, Shcheglova, LM, Shkola, O, Shyrma, Yu, Skillicorn, IO, Slominski, W, Solano, A, Stanco, L, Stefaniuk, N, Stern, A, Stopa, P, Sztuk-Dambietz, J, Tassi, E, Tokushuku, K, Tomaszewska, J, Tsurugai, T, Turcato, M, Turkot, O, Tymieniecka, T, Verbytskyi, A, Abdullah, WAT Wan, Wichmann, K, Wing, M, Yamada, S, Yamazaki, Y, Zarnecki, AF, Zawiejski, L, Zenaiev, O and Zhautykov, BO (2017) Studies of the diffractive photoproduction of isolated photons at HERA. PHYSICAL REVIEW D, 96 (3).

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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 < ETγ < 15 GeV and -0.7 < ηγ < 0.9, inclusively, and also with a jet with transverse energy and pseudorapidity in the ranges 4 < ETjet < 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 z ℙmeas > 0.9, where z ℙmeas 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.

Item Type:	Article
Depositing User:	Symplectic Admin
Date Deposited:	25 Oct 2017 12:20
Last Modified:	19 Jan 2023 06:52
DOI:	10.1103/PhysRevD.96.032006
Open Access URL:	https://arxiv.org/pdf/1705.10251.pdf
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3010517