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Titolo:
Inclusive photoproduction of neutral pions in the photon hemisphere at HERA
Autore:
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; 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; Burkhardt, H; Burrage, A; Buschhorn, G; Campbell, AJ; Cao, J; Carli, T; Caron, S; Chabert, E; 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; Delerue, N; 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; Ellerbrock, M; Elsen, E; Erdmann, M; Faulkner, PJW; Favart, L; Fedotov, A; Felst, R; 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; Goodwin, C; Grab, C; Grassler, H; Greenshaw, T; 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; Hoprich, W; Horisberger, R; Hurling, S; Ibbotson, M; Issever, C; Jacquet, M; Jaffre, M; Janauschek, L; Jansen, DM; Janssen, X; Jemanov, V; Jonsson, L; Johnson, DP; Jones, MAS; Jung, H; Kastli, HK; Kant, D; Kapichine, M; Karlsson, M; Karschnick, O; Kaufmann, O; Kausch, M; Keil, F; Keller, N; Kennedy, J; Kenyon, IR; Kermiche, S; Kiesling, C; Klein, M; Kleinwort, C; Knies, G; Koblitz, B; 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; Kutuev, R; Lachnit, W; Lahmann, R; Lamb, D; Landon, MPJ; Lange, W; Lastovicka, T; Lebedev, A; Leissner, B; Lemaitre, V; Lemrani, R; Lendermann, V; Levonian, S; Lindstroem, M; Lobo, G; Lobodzinska, E; Lobodzinski, B; Loktionova, N; 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; Mehta, A; Meier, K; Merkel, P; Metlica, F; Meyer, A; Meyer, H; Meyer, J; Meyer, PO; Mikocki, S; Milstead, D; Mkrtchyan, T; 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; Nellen, G; Newman, PR; 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; Potachnikova, 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; Schoning, A; Schorner, T; Schroder, V; Schultz-Coulon, HC; Sedlak, K; Sefkow, F; Shekelyan, V; Sheviakov, I; Shtarkov, LN; Siegmon, G; Sievers, P; Sirois, Y; Sloan, T; Smirnov, 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, JE; Tzamariudaki, E; Udluft, S; Usik, A; Valkar, S; Valkarova, A; Vallee, C; Van Mechelen, P; Vazdik, Y; von Dombrowski, S; Wacker, K; Wallny, R; Walter, T; Waugh, B; Weber, G; Weber, M; Wegener, D; Wegner, A; Wengler, T; Werner, M; 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; Zomer, F; Zsembery, J; zur Nedden, M;
Indirizzi:
Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany Berg Univ Gesamthsch Wuppertal Wuppertal Germany ys, Wuppertal, Germany Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany Rhein WestfalTH Aachen Aachen Germany D-5100 1, D-5100 Aachen, Germany Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany Rhein WestfalTH Aachen Aachen Germany D-5100 3, D-5100 Aachen, Germany Univ Birmingham, Sch Phys & Space Res, Birmingham, W Midlands, England Univ Birmingham Birmingham W Midlands England ngham, W Midlands, England Interuniv Inst High Energies, ULB, VUB, Brussels, Belgium Interuniv Inst High Energies Brussels Belgium B, VUB, Brussels, Belgium Univ Instelling Antwerp, B-2610 Wilrijk, Belgium Univ Instelling Antwerp Wilrijk Belgium B-2610 , B-2610 Wilrijk, Belgium Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England Rutherford Appleton Lab Didcot Oxon England OX11 0QX 1 0QX, Oxon, England Inst Nucl Phys, Krakow, Poland Inst Nucl Phys Krakow PolandInst Nucl Phys, Krakow, Poland Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany Univ Dortmund Dortmund Germany D-4600 nst Phys, D-4600 Dortmund, Germany Joint Inst Nucl Res, Dubna, Russia Joint Inst Nucl Res Dubna RussiaJoint Inst Nucl Res, Dubna, Russia CEA Saclay, DAPNIA, DSM, F-91191 Gif Sur Yvette, France CEA Saclay Gif Sur Yvette France F-91191 F-91191 Gif Sur Yvette, France DESY, D-2000 Hamburg, Germany DESY Hamburg Germany D-2000DESY, D-2000 Hamburg, Germany Univ Hamburg, Inst Expt Phys 2, D-2000 Hamburg, Germany Univ Hamburg Hamburg Germany D-2000 Expt Phys 2, D-2000 Hamburg, Germany Max Planck Inst Kernphys, D-69117 Heidelberg, Germany Max Planck Inst Kernphys Heidelberg Germany D-69117 Heidelberg, Germany Univ Heidelberg, Inst Phys, D-6900 Heidelberg, Germany Univ Heidelberg Heidelberg Germany D-6900 ys, D-6900 Heidelberg, Germany Univ Heidelberg, Kirchhoff Inst Phys, Heidelberg, Germany Univ HeidelbergHeidelberg Germany hhoff Inst Phys, Heidelberg, Germany Univ Kiel, Inst Expt & Angew Phys, Kiel, Germany Univ Kiel Kiel GermanyUniv Kiel, Inst Expt & Angew Phys, Kiel, Germany Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia Slovak Acad Sci Kosice Slovakia 04353 Expt Phys, Kosice 04353, Slovakia Univ Lancaster, Sch Phys & Mat, Lancaster, England Univ Lancaster Lancaster England er, Sch Phys & Mat, Lancaster, England Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England Univ Liverpool Liverpool Merseyside England L69 3BX , Merseyside, England Univ London Queen Mary & Westfield Coll, London E1 4NS, England Univ London Queen Mary & Westfield Coll London England E1 4NS S, England Univ Lund, Dept Phys, Lund, Sweden Univ Lund Lund SwedenUniv Lund, Dept Phys, Lund, Sweden Univ Manchester, Dept Phys & Astron, Manchester, Lancs, England Univ Manchester Manchester Lancs England ron, Manchester, Lancs, England Univ Mediterranne, IN2P3, CNRS, CPPM, Marseille, France Univ MediterranneMarseille France IN2P3, CNRS, CPPM, Marseille, France Inst Theoret & Expt Phys, Moscow 117259, Russia Inst Theoret & Expt Phys Moscow Russia 117259 hys, Moscow 117259, Russia PN Lebedev Phys Inst, Moscow 117924, Russia PN Lebedev Phys Inst Moscow Russia 117924 ys Inst, Moscow 117924, Russia Max Planck Inst Phys, D-80805 Munich, Germany Max Planck Inst Phys Munich Germany D-80805 hys, D-80805 Munich, Germany Univ Paris Sud, IN2P3, CNRS, LAL, Orsay, France Univ Paris Sud Orsay France Paris Sud, IN2P3, CNRS, LAL, Orsay, France Ecole Polytech, LPNHE, IN2P3, CNRS, Palaiseau, France Ecole Polytech Palaiseau France , LPNHE, IN2P3, CNRS, Palaiseau, France Univ Paris 06, LPNHE, Paris, France Univ Paris 06 Paris FranceUniv Paris 06, LPNHE, Paris, France Univ Paris 07, IN2P3, CNRS, Paris, France Univ Paris 07 Paris FranceUniv Paris 07, IN2P3, CNRS, Paris, France Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic Acad Sci Czech Republ Prague Czech Republic hys, Prague, Czech Republic Charles Univ, Fac Math & Phys, Prague, Czech Republic Charles Univ Prague Czech Republic Math & Phys, Prague, Czech Republic Ist Nazl Fis Nucl, Rome, Italy Ist Nazl Fis Nucl Rome ItalyIst Nazl Fis Nucl, Rome, Italy Univ Roma 3, Dipartimento Fis, Rome, Italy Univ Roma 3 Rome ItalyUniv Roma 3, Dipartimento Fis, Rome, Italy Paul Scherrer Inst, Villigen, Switzerland Paul Scherrer Inst Villigen Switzerland rer Inst, Villigen, Switzerland Yerevan Phys Inst, Zeuthen, Germany Yerevan Phys Inst Zeuthen GermanyYerevan Phys Inst, Zeuthen, Germany DESY, Zeuthen, Germany DESY Zeuthen GermanyDESY, Zeuthen, Germany ETH Zurich, Inst Teilchenphys, Zurich, Switzerland ETH Zurich Zurich Switzerland h, Inst Teilchenphys, Zurich, Switzerland Univ Zurich, Inst Phys, Zurich, Switzerland Univ Zurich Zurich Switzerland v Zurich, Inst Phys, Zurich, Switzerland Berg Univ Gesamthsch Wuppertal, Rechtzentrum, Wuppertal, Germany Berg UnivGesamthsch Wuppertal Wuppertal Germany um, Wuppertal, Germany Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany Univ Karlsruhe Karlsruhe Germany D-7500 nphys, D-7500 Karlsruhe, Germany CINVESTAV, Dept Fis Ap, Merida, Yucatan, Mexico CINVESTAV Merida Yucatan Mexico AV, Dept Fis Ap, Merida, Yucatan, Mexico Safarik Univ, Kosice, Slovakia Safarik Univ Kosice SlovakiaSafarik Univ, Kosice, Slovakia CERN, Geneva, Switzerland CERN Geneva SwitzerlandCERN, Geneva, Switzerland
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL C
fascicolo: 2, volume: 18, anno: 2000,
pagine: 293 - 302
SICI:
1434-6044(200012)18:2<293:IPONPI>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
LARGE TRANSVERSE-MOMENTUM; LIQUID ARGON CALORIMETER; LEAD/SCINTILLATING-FIBER CALORIMETER; HIGH-ENERGY PHOTOPRODUCTION; PARTICLE CROSS-SECTIONS; LUND MONTE-CARLO; PARTON FRAGMENTATION; PP INTERACTIONS; H1 DETECTOR; PI-0 MESONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Adloff, C Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany Berg Univ Gesamthsch Wuppertal Wuppertal Germany tal, Germany
Citazione:
C. Adloff et al., "Inclusive photoproduction of neutral pions in the photon hemisphere at HERA", EUR PHY J C, 18(2), 2000, pp. 293-302

Abstract

The inclusive cross section for the photoproduction of neutral pious has been measured as a function of the transverse momentum, rapidity, and Feynman x of the pi (0) mesons at an average photon-proton centre-of-mass energy of 208 GeV and for photon virtualities below Q(2) = 0.01 GeV2. The pi (0) measurement extends the range covered by previous charged particle measurements at HERA by two units of rapidity in the photon direction down to a value of -5.5 in the gammap centre-of-mass frame. The pi (0) transverse momentum distribution is well described over the whole measured range by a power law ansatz, while an exponential fit falls below the data at transverse momentum values above 1.5 GeV/c. Good agreement with the predictions of the Monte Carlo models PYTHIA and PHOJET is found. In the context of the PYTHIA model the data are inconsistent with large intrinsic transverse momentum values in the photon.

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Documento generato il 02/04/20 alle ore 22:06:58