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Abramowicz, H.; Adamczyk, L.; Adamus, M.; Antonelli, S.; Arslan, O.; Aushev, V.; Aushev, Y.; Barakbaev, A. N.; Bartosik, N.; Bertolin, A.; Bloch, I.; Bokhonov, V.; Boos, E. G.; Brock, I.; Brzozowska, B.; Bussey, P. J.; Capua, M.; Catterall, C. D.; Chwastowski, J.; Ciesielski, R.; Corradi, M.; Corriveau, F.; D’Agostini, G.; Dementiev, R. K.; Devenish, R. C. E.; Dolinska, G.; Drugakov, V.; Dusini, S.; Ferrando, J.; Figiel, J.; Foster, B.; Geiser, A.; Gladilin, L. K.; Gogota, O.; Golubkov, Yu. A.; Grebenyuk, J.; Grzelak, G.; Hain, W.; Hochman, D.; Hori, R.; Iga, Y.; Januschek, F.; Kadenko, I.; Kananov, S.; Karshon, U.; Kaur, M.; Kaur, P.; Klein, U.; Kotanski, A.; Kötz, U.; Kowalski, H.; Levchenko, B. B.; Libov, V.; Limentani, S.; Lisovyi, M.; Lohmann, W.; Löhr, B.; Longhin, A.; Maeda, J.; Malka, J.; Martin, J. F.; Nobe, T.; Notz, D.; Nowak, R. J.; Olkiewicz, K.; Paul, E.; Perlanski, W.; Przybycien, M.; Raval, A.; Rubinsky, I.; Samojlov, V.; Saxon, D. H.; Schioppa, M.; Schmidke, W. B.; Schwartz, J.; Shcheglova, L. M.; Shevchenko, R.; Shkola, O.; Skillicorn, I. O.; Sola, V.; Solano, A.; Spiridonov, A.; Stefaniuk, N.; Stern, A.; Stewart, T. P.; Stopa, P.; Szuba, D.; Szuba, J.; Temiraliev, T.; Trusov, V.; Turkot, O.; Tymieniecka, T.; Walczak, R.; Wan Abdullah, W. A. T.; Yamada, S.; Yamazaki, Y.; Zenaiev, O.; Zhautykov, B. O.; Zhmak, N.; Zotkin, D. S.
The journal of high energy physics, 1/10, Volume: 2014, Issue: 10Journal Article
A bstract The photoproduction of D ∗± mesons has been measured with the ZEUS detector at HERA at three different ep centre-of-mass energies, s , of 318, 251 and 225 GeV. For each data set, D ∗± mesons were required to have transverse momentum, p T D ∗ , and pseudo-rapidity, η D ∗ , in the ranges 1 . 9 < p T D ∗ < 20 GeV and | η D ∗ | < 1 . 6. The events were required to have a virtuality of the incoming photon, Q 2 , of less than 1 GeV 2 . The dependence on s was studied by normalising to the high-statistics measurement at s = 318 GeV. This led to the cancellation of a number of systematic effects both in data and theory. Predictions from next-to-leading-order QCD describe the s dependence of the data well.
