Forward pi degrees-meson production at HERA

Authors
Adloff, C Andreev, V Andrieu, B Arkadov, V Astvatsatourov, A Ayyaz, I Babaev, A Bahr, J Baranov, P Barrelet, E Bartel, W Bassler, U Bate, P Beglarian, A Behnke, O Beier, C Belousov, A Benisch, T Berger, C Bernardi, G Berndt, T Bertrand-Coremans, G Biddulph, P Bizot, JC Borras, K Boudry, V Braunschweig, W Brisson, V Broker, HB Brown, DP Bruckner, W Bruel, P Bruncko, D Burger, J Busser, FW Bunyatyan, A Burke, S Burrage, A Buschhorn, G Campbell, AJ Cao, J Carli, T Chabert, E Charlet, M Clarke, D Clerbaux, B Collard, C Contreras, JG Coughlan, JA Cousinou, MC Cox, BE Cozzika, G Cvach, J Dainton, JB Dau, WD Daum, K David, M Davidsson, M Delcourt, B Demirchyan, R De Roeck, A De Wolf, EA Diaconu, C Dixon, P Dodonov, V Donovan, KT Dowell, JD Droutskoi, A Duprel, C Ebert, J Eckerlin, G Eckstein, D Efremenko, V Egli, S Eichler, R Eisele, F Eisenhandler, E Elsen, E Erdmann, M Fahr, AB Faulkner, PJW Favart, L Fedotov, A Felst, R Feltesse, J Ferencei, J Ferrarotto, F Ferron, S Fleischer, M Flugge, G Fomenko, A Foresti, I Formanek, J Foster, JM Franke, G Gabathuler, E Gabathuler, K Garvey, J Gassner, J Gayler, J Gerhards, R Ghazaryan, S Glazov, A Goerlich, L Gogitidze, N Goldberg, M Gorelov, I Grab, C Grassler, H Greenshaw, T Griffiths, RK Grindhammer, G Hadig, T Haidt, D Hajduk, L Haustein, V Haynes, WJ Heinemann, B Heinzelmann, G Henderson, RCW Hengstmann, S Henschel, H Heremans, R Herrera, G Herynek, I Hilgers, M Hiller, KH Hilton, CD Hladky, J Hoting, P Hoffmann, D Horisberger, P Hurling, S Ibbotson, M Issever, C Jacquet, M Jaffre, M Janauschek, L Jansen, DM Janssen, X Jonsson, L Johnson, DP Jones, M Jung, H Kastli, HK Kant, D Kapichine, M Karlsson, M Karschnick, O Kaufmann, O Kausch, M Keil, F Keller, N Kenyon, IR Kermiche, S Kiesling, C Klein, M Kleinwort, C Knies, G Kolanoski, H Kolya, SD Korbel, V Kostka, P Kotelnikov, SK Krasny, MW Krehbiel, H Kroseberg, J Krucker, D Kruger, K Kupper, A Kuhr, T Kurca, T Lachnit, W Lahmann, R Lamb, D Landon, MPJ Lange, W Lebedev, A Lehner, F Lemaitre, V Lemrani, R Lendermann, V Levonian, S Lindstroem, M Lobo, G Lobodzinska, E Lubimov, V Luders, S Luke, D Lytkin, L Magnussen, N Mahlke-Kruger, H Malden, N Malinovski, E Malinovski, I Maracek, R Marage, P Marks, J Marshall, R Martyn, HU Martyniak, J Maxfield, SJ McMahon, TR Mehta, A Meier, K Merkel, P Metlica, F Meyer, A Meyer, H Meyer, J Meyer, PO Mikocki, S Milstead, D Mohr, R Mohrdieck, S Mondragon, MN Moreau, F Morozov, A Morris, JV Muller, D Muller, K Murin, P Nagovizin, V Naroska, B Naumann, J Naumann, T Negri, I Newman, PR Nguyen, HK Nicholls, TC Niebergall, F Niebuhr, C Nix, O Nowak, G Nunnemann, T Olsson, JE Ozerov, D Panassik, V Pascaud, C Passaggio, S Patel, GD Perez, E Phillips, JP Pitzl, D Poschl, R Potashnikova, I Povh, B Rabbertz, K Radel, G Rauschenberger, J Reimer, P Reisert, B Reyna, D Riess, S Rizvi, E Robmann, P Roosen, R Rostovtsev, A Royon, C Rusakov, S Rybicki, K Sankey, DPC Scheins, J Schilling, FP Schleif, S Schleper, P Schmidt, D Schmidt, D Schoeffel, L Schorner, T Schroder, V Schultz-Coulon, HC Sefkow, F Shekelyan, V Sheviakov, I Shtarkov, LN Siegmon, G Sievers, P Sirois, Y Sloan, T Smirnow, P Smith, M Solochenko, V Soloviev, Y Spaskov, V Specka, A Spitzer, H Stamen, R Steinhart, J Stella, B Stellberger, A Stiewe, J Straumann, U Struczinski, W Sutton, JP Swart, M Tasevsky, M Tchernyshov, V Tchetchelnitski, S Thompson, G Thompson, PD Tobien, N Traynor, D Truol, P Tsipolitis, G Turnau, J Turney, J Tzamariudaki, E Udluft, S Usik, A Valkar, S Valkarova, A Vallee, C Van Haecke, A Van Mechelen, P Vazdik, Y Villet, G von Dombrowski, S Wacker, K Wallny, R Walter, T Waugh, B Weber, G Weber, M Wegener, D Wegner, A Wengler, T Werner, M West, LR White, G Wiesand, S Wilksen, T Winde, M Winter, GG Wissing, C Wobisch, M Wollatz, H Wunsch, E Zacek, J Zalesak, J Zhang, Z Zhokin, A Zini, P Zomer, F Zsembery, J zur Nedden, M
Citation
C. Adloff et al., Forward pi degrees-meson production at HERA, PHYS LETT B, 462(3-4), 1999, pp. 440-452
Citations number
54
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
462
Issue
3-4
Year of publication
1999
Pages
440 - 452
Database
ISI
SICI code
0370-2693(19990916)462:3-4<440:FPDPAH>2.0.ZU;2-Q
Abstract
High transverse momentum pi(o)-mesons have been measured with the H1 detect or at HERA in deep-inelastic ep scattering events at low Bjorken-x, down to x approximate to 4 . 10(-5). The measurement is performed in a region of s mall angles with respect to the proton remnant in the laboratory frame of r eference, namely the forward region. and corresponds to central rapidity in the centre of mass system of the virtual photon and proton. This region is expected to be particularly sensitive to QCD effects in hadronic final sta tes. Differential cross-sections for inclusive pi(o)-meson production are p resented as a function of Bjorken-x and the four-momentum transfer squared, Q(2), and as a function of transverse momentum and pseudorapidity. A recen t numerical BFKL calculation and predictions from QCD models based on DGLAP parton evolution are compared with the data. (C) 1999 Elsevier Science B.V . All rights reserved.