Production of exclusive dijets in diffractive deep inelastic scattering at HERA: ZEUS Collaboration

H. Abramowicz, I. Abt, L. Adamczyk, M. Adamus, S. Antonelli, V. Aushev, Y. Aushev, O. Behnke, U. Behrens, A. Bertolin, I. Bloch, E. G. Boos, K. Borras, I. Brock, N. H. Brook, R. Brugnera, A. Bruni, P. J. Bussey, A. Caldwell, M. CapuaC. D. Catterall, J. Chwastowski, J. Ciborowski, R. Ciesielski, A. M. Cooper-Sarkar, M. Corradi, F. Corriveau, R. K. Dementiev, R. C.E. Devenish, G. Dolinska, S. Dusini, J. Figiel, B. Foster, G. Gach, E. Gallo, A. Garfagnini, A. Geiser, A. Gizhko, L. K. Gladilin, Yu A. Golubkov, J. Grebenyuk, I. Gregor, G. Grzelak, O. Gueta, M. Guzik, W. Hain, D. Hochman, R. Hori, Z. A. Ibrahim, Y. Iga, M. Ishitsuka, A. Iudin, F. Januschek, N. Z. Jomhari, I. Kadenko, S. Kananov, U. Karshon, M. Kaur, P. Kaur, D. Kisielewska, R. Klanner, U. Klein, N. Kondrashova, O. Kononenko, Ie Korol, I. A. Korzhavina, A. Kotański, U. Kötz, N. Kovalchuk, H. Kowalski, B. Krupa, O. Kuprash, M. Kuze, B. B. Levchenko, A. Levy, V. Libov, S. Limentani, M. Lisovyi, E. Lobodzinska, B. Löhr, E. Lohrmann, A. Longhin, D. Lontkovskyi, O. Yu Lukina, I. Makarenko, J. Malka, S. Mergelmeyer, F. Mohamad Idris, N. Mohammad Nasir, V. Myronenko, K. Nagano, T. Nobe, D. Notz, R. J. Nowak, Yu Onishchuk, E. Paul, W. Perlański, N. S. Pokrovskiy, M. Przybycień, P. Roloff, I. Rubinsky, M. Ruspa, D. H. Saxon, M. Schioppa, W. B. Schmidke, U. Schneekloth, T. Schörner-Sadenius, L. M. Shcheglova, R. Shevchenko, O. Shkola, Yu Shyrma, I. Singh, I. O. Skillicorn, W. Słomiński, A. Solano, L. Stanco, N. Stefaniuk, A. Stern, P. Stopa, J. Sztuk-Dambietz, D. Szuba, J. Szuba, E. Tassi, K. Tokushuku, J. Tomaszewska, A. Trofymov, 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. Żarnecki, L. Zawiejski, O. Zenaiev, B. O. Zhautykov, N. Zhmak, D. S. Zotkin

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Abstract

Production of exclusive dijets in diffractive deep inelastic e±p scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 372 pb-1. The measurement was performed for γ∗–p centre-of-mass energies in the range 90<W<250GeV and for photon virtualities Q2>25GeV2. Energy flows around the jet axis are presented. The cross section is presented as a function of β and ϕ, where β=x/xIP, x is the Bjorken variable and xIP is the proton fractional longitudinal momentum loss. The angle ϕ is defined by the γ∗–dijet plane and the γ∗–e± plane in the rest frame of the diffractive final state. The ϕ cross section is measured in bins of β. The results are compared to predictions from models based on different assumptions about the nature of the diffractive exchange.

Original languageEnglish
Article number16
Pages (from-to)1-18
Number of pages18
JournalEuropean Physical Journal C
Volume76
Issue number1
DOIs
StatePublished - 1 Jan 2016

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