Exclusive electroproduction of rho(0) and J/psi mesons at HERA

Breitweg, J; Chekanov, S; Derrick, M; Krakauer, D; Magill, S; Mikunas, D; Musgrave, B; Repond, J; Stanek, R; Talaga, Rl; Yoshida, R; Zhang, H; Mck, Mattingly; Anselmo, F; Antonioli, P; Bari, G; Basile, M; Bellagamba, L; Boscherini, D; Bruni, A; Bruni, G; Romeo, Gc; Castellini, G; Cifarelli, L; Cindolo, F; Contin, A; Coppola, N; Corradi, M; De Pasquale, S; Giusti, P; Iacobucci, G; Laurenti, G; Levi, G; Margotti, A; Massam, T; Nania, R; Pesci, A; Polini, A; Sartorelli, G; Garcia, Yz; Zichichi, A; Amelung, C; Bornheim, A; Brock, I; Coboken, K; Crittenden, J; Deffner, R; Eckert, M; Grothe, M; Hartmann, H; Heinloth, K; Heinz, L; Hilger, E; Jakob, Hp; Kappes, A; Katz, Uf; Kerger, R; Paul, E; Pfeiffer, M; Schnurbusch, H; Weber, A; Wieber, H; Bailey, Ds; Cottingham, Wn; Foster, B; Hall Wilton, R; Heath, Gp; Heath, Hf; Mcfall, Jd; Piccioni, D; Roff, Dg; Scott, J; Tapper, Rj; Capua, Marcella; Iannotti, L; Mastroberardino, Anna; Schioppa, M; Susinno, G; Kim, Jy; Lee, Jh; Lim, It; Pac, My; Caldwell, A; Cartiglia, N; Jing, Z; Liu, W; Mellado, B; Parsons, Ja; Ritz, S; Sampson, S; Sciulli, F; Straub, Pb; Zhu, Q; Borzemski, P; Chwastowski, J; Eskreys, A; Figiel, J; Klimek, K; Przybycien, Mb; Zawiejski, L; Adamczyk, L; Bednarek, B; Bukowy, M; Czermak, Am; Jelen, K; Kisielewska, D; Kowalski, T; Przybycien, M; Rulikowska Zarebska, E; Suszycki, L; Zajac, J; Dulinski, Z; Kotanski, A; Abbiendi, G; Lat, Bauerdick; Behrens, U; Beier, H; Bienlein, Jk; Desler, K; Drews, G; Fricke, U; Goebel, F; Gottlicher, P; Graciani, R; Haas, T; Hain, W; Hartner, Gf; Hasell, D; Hebbel, K; Johnson, Kf; Kasemann, M; Koch, W; Kotz, U; Kowalski, H; Lindemann, L; Lohr, B; Martinez, M; Milewski, J; Milite, M; Monteiro, T; Notz, D; Pellegrino, A; Pelucchi, F; Piotrzkowski, K; Rohde, M; Roldan, J; Ryan, Jj; Prb, Saull; Savin, Aa; Schneekloth, U; Schwarzer, O; Selonke, F; Sievers, M; Stonjek, S; Surrow, B; Tassi, Enrico; Westphal, D; Wolf, G; Wollmer, U; Youngman, C; Zeuner, W; Burow, Bd; Coldewey, C; Grabosch, Hj; Meyer, A; Schlenstedt, S; Barbagli, G; Gallo, E; Pelfer, P; Maccarrone, G; Votano, L; Bamberger, A; Eisenhardt, S; Markun, P; Raach, H; Trefzger, T; Wolfle, S; Bromley, Jt; Brook, Nh; Bussey, Pj; Doyle, At; Lee, Sw; Macdonald, N; Mccance, Gj; Saxon, Dh; Sinclair, Le; Skillicorn, Io; Strickland, E; Waugh, R; Bohnet, I; Gendner, N; Holm, U; Meyer Larsen, A; Salehi, H; Wick, K; Garfagnini, A; Gialas, I; Gladilin, Lk; Kcira, D; Klanner, R; Lohrmann, E; Poelz, G; Zetsche, F; Bacon, Tc; Butterworth, I; Cole, Je; Howell, G; Lamberti, L; Long, Kr; Miller, Db; Pavel, N; Prinias, A; Sedgbeer, Jk; Sideris, D; Walker, R; Mallik, U; Wang, Sm; Jt, Wu; Cloth, P; Filges, D; Fleck, Ji; Ishii, T; Kuze, M; Suzuki, I; Tokushuku, K; Yamada, S; Yamauchi, K; Yamazaki, Y; Hong, Sj; Lee, Sb; Nam, Sw; Park, Sk; Lim, H; Park, Ih; Son, D; Barreiro, F; Fernandez, Jp; Garcia, G; Glasman, C; Hernandez, Jm; Hervas, L; Labarga, L; del Peso, J; Puga, J; Redondo, I; Terron, J; de Troconiz JF,; Corriveau, F; Hanna, Ds; Hartmann, J; Murray, Wn; Ochs, A; Riveline, M; Stairs, Dg; St Laurent, M; Tsurugai, T; Bashkirov, V; Dolgoshein, Ba; Stifutkin, A; Bashindzhagyan, Gl; Ermolov, Pf; Golubkov, Ya; Khein, La; Korotkova, Na; Korzhavina, Ia; Kuzmin, Va; Lukina, Oy; Proskuryakov, As; Shcheglova, Lm; Solomin, An; Zotkin, Sa; Bokel, C; Botje, M; Brummer, N; Engelen, J; Koffeman, E; Kooijman, P; van Sighem, A; Tiecke, H; Tuning, N; Verkerke, W; Vossebeld, J; Wiggers, L; de Wolf, E; Acosta, D; Bylsma, B; Durkin, Ls; Gilmore, J; Ginsburg, Cm; Kim, Cl; Ling, Ty; Nylander, P; Romanowski, Ta; Blaikley, He; Cashmore, Rj; Cooper Sarkar AM,; Rce, Devenish; Edmonds, Jk; Grosse Knetter, J; Harnew, N; Nath, C; Noyes, Va; Quadt, A; Ruske, O; Tickner, Jr; Walczak, R; Waters, Ds; Bertolin, A; Brugnera, R; Carlin, R; Dal Corso, F; Dosselli, U; Limentani, S; Morandin, M; Posocco, M; Stanco, L; Stroili, R; Voci, C; By, Oh; Okrasinski, Jr; Toothacker, Ws; Whitmore, Jj; Iga, Y; D'Agostini, G; Marini, G; Nigro, A; Raso, M; Hart, Jc; Mccubbin, Na; Shah, Tp; Epperson, D; Heusch, C; Rahn, Jt; Hfw, Sadrozinski; Seiden, A; Wichmann, R; Williams, Dc; Abramowicz, H; Briskin, G; Dagan, S; Kananov, S; Levy, A; Abe, T; Fusayasu, T; Inuzuka, M; Nagano, K; Umemori, K; Yamashita, T; Hamatsu, R; Hirose, T; Homma, K; Kitamura, S; Matsushita, T; Nishimura, T; Arneodo, M; Cirio, R; Costa, M; Ferrero, Mi; Maselli, S; Monaco, V; Peroni, C; Petrucci, Mc; Ruspa, M; Sacchi, R; Solano, A; Staiano, A; Dardo, M; Bailey, Dc; Fagerstroem, Cp; Galea, R; Joo, Kk; Levman, Gm; Martin, Jf; Orr, Rs; Polenz, S; Sabetfakhri, A; Simmons, D; Butterworth, Jm; Catterall, Cd; Hayes, Me; Heaphy, Ea; Jones, Tw; Lane, Jb; Saunders, Rl; Sutton, Mr; Wing, M; Ciborowski, J; Grzelak, G; Nowak, Rj; Pawlak, Jm; Pawlak, R; Smalska, B; Tymieniecka, T; Wroblewski, Ak; Zakrzewski, Ja; Zarnecki, Af; Adamus, M; Deppe, O; Eisenberg, Y; Hochman, D; Karshon, U; Badgett, Wf; Chapin, D; Cross, R; Foudas, C; Mattingly, S; Reeder, Dd; Smith, Wh; Vaiciulis, A; Wildschek, T; Wodarczyk, M; Deshpande, A; Dhawan, S; Hughes, Vw; Bhadra, S; Frisken, Wr; Khakzad, M; Schmidke, Wb; Capua, M; Mastroberardino, A; Schioppa, Marco; Tassi, E

doi:10.1007/s100520050369

Exclusive production of rho(0) and J/psi mesons in e(+)p collisions has been studied with the ZEUS detector in the kinematic range 0.25 < Q(2) < 50 GeV(2), 20 < W < 167 GeV for the rho(0) data and 2 < Q(2) < 40 GeV(2), 50 < IS' < 150 GeV for the J/psi data. Cross sections for exclusive rho(0) and J/psi, production have been measured as a function of Q2, W and t. The spin-density matrix elements r(00)(04), r(1-1)(1) and Rer(10)(5) have been determined for exclusive rho(0) production as well as r(00)(04) and r(1-1)(04) for exclusive J/psi production. The results are discussed in the context of theoretical models invoking soft and hard phenomena.