Measurement of Inelastic J/psi  and psi' Photoproduction at HERA

Chekanov, S; Krakauer, D; Magill, S; Musgrave, B; Repond, J; Yoshida, R; Mattingly, Mck; Antonioli, P; Bari, G; Basile, M; Bellagamba, L; Boscherini, D; Bruni, A; Bruni, G; Romeo, Gc; Cifarelli, L; Cindolo, F; Contin, A; Corradi, M; De Pasquale, Salvatore; Giusti, P; Iacobucci, G; Margotti, A; Nania, R; Palmonari, F; Pesci, A; Sartorelli, G; Zichichi, A; Aghuzumtsyan, G; Bartsch, D; Brock, I; Goers, S; Hartmann, H; Hilger, E; Irrgang, P; Jakob, Hp; Kappes, A; Katz, Uf; Kind, O; Paul, E; Rautenberg, J; Renner, R; Schnurbusch, H; Stifutkin, A; Tandler, J; Voss, Kc; Wang, M; Weber, A; Bailey, Ds; Brook, Nh; Cole, Je; Foster, B; Heath, Gp; Heath, Hf; Robins, S; Rodrigues, E; Scott, J; Tapper, Rj; Wing, M; Capua, M; Mastroberardino, A; Schioppa, M; Susinno, G; Kim, Jy; Kim, Yk; Lee, Jh; Lim, It; Pac, My; Caldwell, A; Helbich, M; Liu, X; Mellado, B; Ning, Y; Paganis, S; Ren, Z; Schmidke, Wb; Sciulli, F; Chwastowski, J; Eskreys, A; Figiel, J; Olkiewicz, K; Stopa, P; Zawiejski, L; Adamczyk, L; Bold, T; Grabowska Bold, I; Kisielewska, D; Kowal, Am; Kowal, M; Kowalski, T; Przybycien, M; Suszycki, L; Szuba, D; Szuba, J; Kotasnski, A; Slominski, W; Bauerdick, Lat; Behrens, U; Bloch, I; Borras, K; Chiochia, V; Dannheim, D; Derrick, M; Drews, G; Fourletova, J; Fox Murphy, A; Fricke, U; Geiser, A; Goebel, F; Gottlicher, P; Gutsche, O; Haas, T; Hain, W; Hartner, Gf; Hillert, S; Kotz, U; Kowalski, H; Kramberger, G; Labes, H; Lelas, D; Lohr, B; Mankel, R; Melzer Pellmann, Ia; Moritz, M; Notz, D; Petrucci, Mc; Polini, A; Raval, A; Schneekloth, U; Selonke, F; Wessoleck, H; Wichmann, R; Wolf, G; Youngman, C; Zeuner, W; Viani, Ald; Meyer, A; Schlenstedt, S; Barbagli, G; Gallo, E; Genta, C; Pelfer, Pg; Bamberger, A; Benen, A; Coppola, N; Bell, M; Bussey, Pj; Doyle, At; Glasman, C; Hanlon, S; Lee, Sw; Lupi, A; Mccance, Gj; Saxon, Dh; Skillicorn, Io; Gialas, I; Bodmann, B; Carli, T; Holm, U; Klimek, K; Krumnack, N; Lohrmann, E; Milite, M; Salehi, H; Stonjek, S; Wick, K; Ziegler, A; Ziegler, A; Collins Tooth, C; Foudas, C; Goncalo, R; Long, Kr; Metlica, F; Tapper, Ad; Cloth, P; Filges, D; Kuze, M; Nagano, K; Tokushuku, K; Yamada, S; Yamazaki, Y; Barakbaev, An; Boos, Eg; Pokrovskiy, Ns; Zhautykov, Bo; Lim, H; Son, D; Barreiro, F; Gonzalez, O; Labarga, L; del Peso, J; Redondo, I; Tassi, E; Terron, J; Vazquez, M; Barbi, M; Bertolin, A; Corriveau, F; Ochs, A; Padhi, S; Stairs, Dg; St Laurent, M; Tsurugai, T; Antonov, A; Danilov, P; Dolgoshein, Ba; Gladkov, D; Sosnovtsev, V; Suchkov, S; Dementiev, Rk; Ermolov, Pf; Golubkov, Ya; Katkov, Ii; Khein, La; Korzhavina, Ia; Kuzmin, Va; Levchenko, Bb; Lukina, Oy; Proskuryakov, As; Shcheglova, Lm; Vlasov, Nn; Zotkin, Sa; Bokel, C; Engelen, J; Grijpink, S; Koffeman, E; Kooijman, P; Maddox, E; Pellegrino, A; Schagen, S; Tiecke, H; Tuning, N; Velthuis, Jj; Wiggers, L; de Wolf, E; Brummer, N; Bylsma, B; Durkin, Ls; Ling, Ty; Boogert, S; Cooper Sarkar, Am; Devenish, Rce; Ferrando, J; Grzelak, G; Matsushita, T; Rigby, M; Ruske, O; Sutton, Mr; Walczak, R; Brugnera, R; Carlin, R; Dal Corso, F; Dusini, S; Garfagnini, A; Limentani, S; Longhin, A; Parenti, A; Posocco, M; Stanco, L; Turcato, M; Heaphy, Ea; By, Oh; Saull, Prb; Whitmore, Jj; Iga, Y; D'Agostini, G; Marini, G; Nigro, A; Cormack, C; Hart, Jc; Mccubbin, Na; Heusch, C; Park, Ih; Pavel, N; Abramowicz, H; Gabareen, A; Kananov, S; Kreisel, A; Levy, A; Abe, T; Fusayasu, T; Kagawa, S; Kohno, T; Tawara, T; Yamashita, T; Hamatsu, R; Hirose, T; Inuzuka, M; Kitamura, S; Matsuzawa, K; Nishimura, T; Arneodo, M; Ferrero, Mi; Monaco, V; Ruspa, M; Sacchi, R; Solano, A; Galea, R; Koop, T; Levman, Gm; Martin, Jf; Mirea, A; Sabetfakhri, A; Butterworth, Jm; Gwenlan, C; Hall Wilton, R; Jones, Tw; Lightwood, Ms; Loizides, Jh; West, Bj; Ciborowski, J; Ciesielski, R; Nowak, Rj; Pawlak, Jm; Smalska, B; Sztuk, J; Tymieniecka, T; Ukleja, A; Ukleja, J; Zarnecki, Af; Adamus, M; Plucinski, P; Eisenberg, Y; Gladilin, Lk; Hochman, D; Karshon, U; Kcira, D; Lammers, S; Li, L; Reeder, Dd; Savin, Aa; Smith, Wh; Deshpande, A; Dhawan, S; Hughes, Vw; Straub, Pb; Bhadra, S; Catterall, Cd; Fourletov, S; Menary, S; Soares, M; Standage, J.

doi:10.1140/epjc/s2002-01130-2

The cross sections for inelastic photoproduction of J/ψ and ψ′ mesons have been measured in ep collisions with the ZEUS detector at HERA, using an integrated luminosity of 38.0 pb-1. The events were required to have 0.1 < z < 0.9 and 50 < W < 180 GeV, where z is the fraction of the incident photon energy carried by the J/ψ in the proton rest frame and W is the photon-proton centre-of-mass energy. The ψ′ to J/ψ cross-section ratio was measured in the range 0.55 < z < 0.9. The J/ψ data, for various ranges of transverse momentum, are compared to theoretical models incorporating colour-singlet and colour-octet matrix elements. Predictions of a next-to-leading-order colour-singlet model give a good description of the data, although there is a large normalisation uncertainty. The J/ψ helicity distribution for z > 0.4 is compared to leading-order QCD predictions.

Titolo:	Measurement of Inelastic J/psi and psi' Photoproduction at HERA
Autori:	Chekanov, S Krakauer, D Magill, S Musgrave, B Repond, J Yoshida, R Mattingly, Mck Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Romeo, Gc Cifarelli, L Cindolo, F Contin, A Corradi, M DE PASQUALE, Salvatore Giusti, P Iacobucci, G Margotti, A Nania, R Palmonari, F Pesci, A Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, Hp Kappes, A Katz, Uf Kind, O Paul, E Rautenberg, J Renner, R Schnurbusch, H Stifutkin, A Tandler, J Voss, Kc Wang, M Weber, A Bailey, Ds Brook, Nh Cole, Je Foster, B Heath, Gp Heath, Hf Robins, S Rodrigues, E Scott, J Tapper, Rj Wing, M Capua, M Mastroberardino, A Schioppa, M Susinno, G Kim, Jy Kim, Yk Lee, Jh Lim, It Pac, My Caldwell, A Helbich, M Liu, X Mellado, B Ning, Y Paganis, S Ren, Z Schmidke, Wb Sciulli, F Chwastowski, J Eskreys, A Figiel, J Olkiewicz, K Stopa, P Zawiejski, L Adamczyk, L Bold, T Grabowska Bold, I Kisielewska, D Kowal, Am Kowal, M Kowalski, T Przybycien, M Suszycki, L Szuba, D Szuba, J Kotasnski, A Slominski, W Bauerdick, Lat Behrens, U Bloch, I Borras, K Chiochia, V Dannheim, D Derrick, M Drews, G Fourletova, J Fox Murphy, A Fricke, U Geiser, A Goebel, F Gottlicher, P Gutsche, O Haas, T Hain, W Hartner, Gf Hillert, S Kotz, U Kowalski, H Kramberger, G Labes, H Lelas, D Lohr, B Mankel, R Melzer Pellmann, Ia Moritz, M Notz, D Petrucci, Mc Polini, A Raval, A Schneekloth, U Selonke, F Wessoleck, H Wichmann, R Wolf, G Youngman, C Zeuner, W Viani, Ald Meyer, A Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, Pg Bamberger, A Benen, A Coppola, N Bell, M Bussey, Pj Doyle, At Glasman, C Hanlon, S Lee, Sw Lupi, A Mccance, Gj Saxon, Dh Skillicorn, Io Gialas, I Bodmann, B Carli, T Holm, U Klimek, K Krumnack, N Lohrmann, E Milite, M Salehi, H Stonjek, S Wick, K Ziegler, A Ziegler, A Collins Tooth, C Foudas, C Goncalo, R Long, Kr Metlica, F Tapper, Ad Cloth, P Filges, D Kuze, M Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Barakbaev, An Boos, Eg Pokrovskiy, Ns Zhautykov, Bo Lim, H Son, D Barreiro, F Gonzalez, O Labarga, L del Peso, J Redondo, I Tassi, E Terron, J Vazquez, M Barbi, M Bertolin, A Corriveau, F Ochs, A Padhi, S Stairs, Dg St Laurent, M Tsurugai, T Antonov, A Danilov, P Dolgoshein, Ba Gladkov, D Sosnovtsev, V Suchkov, S Dementiev, Rk Ermolov, Pf Golubkov, Ya Katkov, Ii Khein, La Korzhavina, Ia Kuzmin, Va Levchenko, Bb Lukina, Oy Proskuryakov, As Shcheglova, Lm Vlasov, Nn Zotkin, Sa Bokel, C Engelen, J Grijpink, S Koffeman, E Kooijman, P Maddox, E Pellegrino, A Schagen, S Tiecke, H Tuning, N Velthuis, Jj Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, Ls Ling, Ty Boogert, S Cooper Sarkar, Am Devenish, Rce Ferrando, J Grzelak, G Matsushita, T Rigby, M Ruske, O Sutton, Mr Walczak, R Brugnera, R Carlin, R Dal Corso, F Dusini, S Garfagnini, A Limentani, S Longhin, A Parenti, A Posocco, M Stanco, L Turcato, M Heaphy, Ea Oh, By Saull, Prb Whitmore, Jj Iga, Y D'Agostini, G Marini, G Nigro, A Cormack, C Hart, Jc Mccubbin, Na Heusch, C Park, Ih Pavel, N Abramowicz, H Gabareen, A Kananov, S Kreisel, A Levy, A Abe, T Fusayasu, T Kagawa, S Kohno, T Tawara, T Yamashita, T Hamatsu, R Hirose, T Inuzuka, M Kitamura, S Matsuzawa, K Nishimura, T Arneodo, M Ferrero, Mi Monaco, V Ruspa, M Sacchi, R Solano, A Galea, R Koop, T Levman, Gm Martin, Jf Mirea, A Sabetfakhri, A Butterworth, Jm Gwenlan, C Hall Wilton, R Jones, Tw Lightwood, Ms Loizides, Jh West, Bj Ciborowski, J Ciesielski, R Nowak, Rj Pawlak, Jm Smalska, B Sztuk, J Tymieniecka, T Ukleja, A Ukleja, J Zarnecki, Af Adamus, M Plucinski, P Eisenberg, Y Gladilin, Lk Hochman, D Karshon, U Kcira, D Lammers, S Li, L Reeder, Dd Savin, Aa Smith, Wh Deshpande, A Dhawan, S Hughes, Vw Straub, Pb Bhadra, S Catterall, Cd Fourletov, S Menary, S Soares, M Standage, J. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2003
Rivista:	THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Handle:	http://hdl.handle.net/11386/1064675
Appare nelle tipologie:	1.1.1 Articolo su rivista con DOI

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