Breitweg, J , Chekanov, S , Derrick, M , Krakauer, D , Magill, S , Musgrave, B , Pellegrino, A , Repond, J , Stanek, R , Yoshida, R , Mattingly, M C K , Abbiendi, G , Anselmo, F , Antonioli, P , Bari, G , Basile, M , Bellagamba, L , Boscherini, D , Bruni, A , Bruni, C , Romeo, G C , 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 , Palmonari, F , Pesci, A , Polini, A , Sartorelli, G , Garcia, Y Z , Zichichi, A , Amelung, C , Bornheim, A , Brock, I , Coboken, K , Crittenden, J , Deffner, R , Hartmann, H , Heinloth, K , Hilger, E , Irrgang, P , Jakob, H P , Kappes, A , Katz, U F , Kerger, R , Paul, E , Schnurbusch, H , Stifutkin, A , Tandler, J , Voss, K C , Weber, A , Wieber, H , Bailey, D S , Barret, O , Brook, N H , Foster, B , Heath, G P , Heath, H F , McFall, J D , Piccioni, D , Rodrigues, E , Scott, J , Tapper, R J , Capua, M , Mastroberardino, A , Schioppa, M , Susinno, G , Jeoung, H Y , Kim, J Y , Lee, J H , Lim, I T , Ma, K J , Pac, M Y , Caldwell, A , Liu, W , Liu, X , Mellado, B , Paganis, S , Sampson, S , Schmidke, W B , Sciulli, F , Chwastowski, J , Eskreys, A , Figiel, J , Klimek, K , Olkiewicz, K , Piotrzkowski, K , Przybycien, M B , Stopa, P , Zawiejski, L , Bednarek, B , Jelen, K , Kisielewska, D , Kowal, A M , Kowalski, T , Przybycien, M , Rulikowska-Zarebska, E , Suszycki, L , Szuba, D , Kotanski, A , Bauerdick, L A T , Behrens, U , Bienlein, J K , Burgard, C , Dannheim, D , Desler, K , Drews, G , Fox-Murphy, A , Fricke, U , Goebel, F , Gottlicher, P , Graciani, R , Haas, T , Hain, W , Hartner, G F , Hasell, D , Hebbel, K , Johnson, K F , Kasemann, M , Koch, W , Kotz, U , Kowalski, H , Lindemann, L , Lohr, B , Martinez, M , Milite, M , Monteiro, T , Moritz, M , Notz, D , Pelucchi, F , Petrucci, M C , Rohde, M , Saull, P R B , Savin, A A , Schneekloth, U , Selonke, F , Sievers, M , Stonjek, S , Tassi, E , Wolf, G , Wollmer, U , Youngman, C , Zeuner, W , Coldewey, C , Viani, A L D , Meyer, A , Schlenstedt, S , Straub, P B , Barbagli, G , Gallo, E , Pelfer, P , Maccarrone, G , Votano, L , Bamberger, A , Benen, A , Eisenhardt, S , Markun, P , Raach, H , Wolfle, S , Bussey, P J , Doyle, A T , Lee, S W , Macdonald, N , McCance, G J , Saxon, D H , Sinclair, L E , Skillicorn, I O , Waugh, R , Bohnet, I , Gendner, N , Holm, U , Meyer-Larsen, A , Salehi, H , Wick, K , Garfagnini, A , Gialas, I , Gladilin, L K , Kcira, D , Klanner, R , Lohrmann, E , Poelz, G , Zetsche, F , Goncalo, R , Long, K R , Miller, D B , Tapper, A D , Walker, R , Mallik, U , Cloth, P , Filges, D , Ishii, T , Kuze, M , Nagano, K , Tokushuku, K , Yamada, S , Yamazaki, Y , Ahn, S H , Lee, S B , Park, S K , Lim, H , Park, I H , Son, D , Barreiro, F , Garcia, G , Glasman, C , Gonzalez, O , Labarga, L , del Peso, J , Redondo, I , Terron, J , Barbi, M , Corriveau, F , Hanna, D S , Ochs, A , Padhi, S , Riveline, M , Stairs, D G , Wing, M , Tsurugai, T , Bashkirov, V , Dolgoshein, B A , Dementiev, R K , Ermolov, P F , Golubkov, Y A , Katkov, I I , Khein, L A , Korotkova, N A , Korzhavina, I A , Kuzmin, V A , Lukina, O Y , Proskuryakov, A S , Shcheglova, L M , Solomin, A N , Vlasov, N N , Zotkin, S A , Bokel, C , Botje, M , Brummer, N , Engelen, J , Grijpink, S , Koffeman, E , Kooijman, P , Schagen, S , van Sighem, A , Tiecke, H , Tuning, N , Velthuis, J J , Vossebeld, J , Wiggers, I , de Wolf, E , Acosta, D , Bylsma, B , Durkin, L S , Gilmore, J , Ginsburg, C M , Kim, C L , Ling, T Y , Boogert, S , Cooper-Sarkar, A M , Devenish, R C E , Grosse-Knetter, J , Matsushita, T , Ruske, O , Sutton, M R , Walczak, R , Bertolin, A , Brugnera, R , Carlin, R , Dal Corso, F , Dosselli, U , Dusini, S , Limentani, S , Morandin, M , Posocco, M , Stanco, I , Stroili, R , Voci, C , Adamczyk, L , Iannotti, L , Oh, B Y , Okrasinski, J R , Toothacker, W S , Whitmore, J J , Iga, Y , D'Agostini, G , Marini, G , Nigro, A , Cormack, C , Hart, J C , McCubbin, N A , Shah, T P , Epperson, D , Heusch, C , Sadrozinski, H F W , Seiden, A , Wichmann, R , Williams, D C , Pavel, N , Abramowicz, H , Dagan, S , Kananov, S , Kreisel, A , Levy, A , Abe, T , Fusayasu, T , Umemori, K , Yamashita, T , Hamatsu, R , Hirose, T , Inuzuka, M , Kitamura, S , Nishimura, T , Arneodo, M , Cartiglia, N , Cirio, R , Costa, M , Ferrero, M I , Maselli, S , Monaco, V , Peroni, C , Ruspa, M , Sacchi, R , Solano, A , Staiano, A , Dardo, M , Bailey, D C , Fagerstroem, C P , Galea, R , Koop, T , Levman, G M , Martin, J F , Orr, R S , Polenz, S , Sabetfakhri, A , Simmons, D , Butterworth, J M , Catterall, C D , Hayes, M E , Heaphy, E A , Jones, T W , Lane, J B , West, B J , Ciborowski, J , Ciesielski, R , Grzelak, G , Nowak, R J , Pawlak, J M , Pawlak, R , Smalska, B , Tymieniecka, T , Wroblewski, A K , Zakrzewski, J A , Zarnecki, A F , Adamus, M , Gadaj, T , Deppe, O , Eisenberg, Y , Hochman, D , Karshon, U , Badgett, W F , Chapin, D , Cross, R , Foudas, C , Mattingly, S , Reeder, D D , Smith, W H , Vaiciulis, A , Wildschek, T , Wodarczyk, M , Deshpande, A , Dhawan, S , Hughes, V W , Bhadra, S , Catterall, C , Cole, J E , Frisken, W R , Hall-Wilton, R , Khakzad, M and Menary, S (2000) Measurement of inclusive (D-s(+/-)) photoproduction at HERA. Physics Letters B, 481 (2-4).
Full text access: Open
The first measurement of inclusive D-s(+/-) photoproduction at HERA has been performed with the ZEUS detector for photon-proton centre-of-mass energies; 130 < W < 280 GeV The measured cross section for 3 < p(perpendicular to)(Ds) < 12 GeV and \eta(Ds)\ < 1.5 is sigma(ep-->DsX) = 3.79 +/- 0.59(stat.)(-0.46)(+0.26)(syst.) +/- 0.94(br.) nb, where the last error arises from the uncertainty in the D-s(+/-) decay branching ratio. The measurements are compared with inclusive D*(+/-) photoproduction cross sections in the same kinematic region and with QCD calculations. The D-s(+/-) cross sections lie above a fixed-order next-to-leading order calculation and agree better with a tree-level O(alpha alpha(s)(3)) calculation that was tuned to describe the ZEUS D* (+/-) cross sections. The ratio of D-s(+/-) to D*(+/-) cross sections is 0.41 +/- 0.07(stat.)(-0.05)(+0.03)(syst.) +/- 0.10 (br.). From this ratio, the strangeness-suppression factor in charm photoproduction, within the LUND string fragmentation model, has been calculated to be gamma(s)= 0.27 +/- 0.05 +/- 0.07(br.). The cross-section ratio and gamma(s) are in good agreement with those obtained in charm production in e(+)e(-) annihilation. (C) 2000 Elsevier Science B.V. All rights reserved.
This is a Submitted version This version's date is: 25/5/2000 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/6a498011-c4e6-849d-1692-881c46e3e02e/4/
Deposited by Research Information System (atira) on 03-Jul-2014 in Royal Holloway Research Online.Last modified on 03-Jul-2014