Akademska digitalna zbirka SLovenije - logo
E-viri
  • Measurement of the t depend...
    Abt, I; Adamus, M; Antonov, A; Aushev, V; Barakbaev, AN; Bari, G; Behr, J; Bertolin, A; Bindi, M; Bondarenko, K; Boscherini, D; Bruni, A; Brzozowska, B; Bussey, P J; Bylsma, B; Carlin, R; Chwastowski, J; Cifarelli, L; Contin, A; Coppola, N; del Peso, J; Dolgoshein, BA; Dolinska, G; Figiel, J; Galas, A; Gallo, E; Glasman, C; Golubkov, YuA; Gottlicher, P; Grabowska-Bold, I; Gregor, I; Hartmann, H; Huettmann, A; Iga, Y; Ishitsuka, M; Jakob, H-P; Kadenko, I; Kahle, B; Kanno, T; Karshon, U; Karstens, F; Katkov, I I; Kim, J Y; Kisielewska, D; Klanner, R; Klein, U; Kooijman, P; Kotanski, A; Kotz, U; Kuze, M; Levchenko, B B; Levy, A; Limentani, S; Lisovyi, M; Lontkovskyi, D; Maeda, J; Margotti, A; Melzer-Pellmann, I-A; Mergelmeyer, S; Mohamad Idris, F; Monaco, V; Mujkic, K; Musgrave, B; Nagano, K; Nowak, R J; Okazaki, N; Papageorgiu, K; Parenti, A; Paul, E; Pelfer, P G; Perlanski, W; Perrey, H; Piotrzkowski, K; Pokrovskiy, N S; Proskuryakov, A S; Przybycien, M; Ren, Z; Ruspa, M; Sartorelli, G; Saxon, D H; Schleper, P; Shimizu, S; Smith, W H; Stadie, H; Suchkov, S; Suszycki, L; Szuba, D; Szuba, J; Tassi, E; Tomalak, O; Vazquez, M; Verbytskyi, A; Volynets, O; Walczak, R; Wan Abdullah, WAT; Wrona, K; Youngman, C; Zenaiev, O; Zhautykov, BO; Zotkin, D S

    Physics letters. B, 02/2012, Letnik: 708, Številka: 1-2
    Journal Article

    The exclusive photoproduction reaction gamma p arrow right Upsilon ( 1 S ) p has been studied with the ZEUS detector in ep collisions at HERA using an integrated luminosity of 468 pb - 1 . The measurement covers the kinematic range 60 < W < 220 GeV and Q 2 < 1 GeV 2 , where W is the photon-proton centre-of-mass energy and Q 2 is the photon virtuality. The exponential slope, b, of the t dependence of the cross section, where t is the squared four-momentum transfer at the proton vertex, has been measured, yielding b = 4.3 - 1.3 + 2.0 ( stat . ) - 0.6 + 0.5 ( syst . ) GeV - 2 . This constitutes the first measurement of the t dependence of the gamma p arrow right Upsilon ( 1 S ) p cross section.