Jets and energy flow in photon-proton collisions at HERA

S. Aid,V. Andreev,B. Andrieu,R.-D. Appuhn,M. Arpagaus,A. Babaev,J. Bähr, J. Bán, Y. Ban,P. Baranov,E. Barrelet,R. Barschke,W. Bartel, M. Barth,U. Bassler,H. P. Beck, H.-J. Behrend,A. Belousov,Ch. Berger,G. Bernardi,R. Bernet,G. Bertrand-Coremans,M. Besançon,R. Beyer,P. Biddulph,P. Bispham,J. C. Bizot, V. Blobel,K. Borras,F. Botterweck,V. Boudry,S. Bourov,A. Braemer,F. Brasse,W. Braunschweig,V. Brisson,D. Bruncko,C. Brune,R. Buchholz,L. Büngener,J. Bürger,F. W. Büsser,A. Buniatian,S. Burke,M. J. Burton,G. Buschhorn,A. J. Campbell, T. Carli,F. Charles,M. Charlet,D. Clarke,A. B. Clegg,B. Clerbaux,J. G. Contreras,C. Cormack,J. A. Coughlan,A. Courau,Ch. Coutures,G. Cozzika,L. Criegee,D. G. Cussans,J. Cvach,S. Dagoret,J. B. Dainton,W. D. Dau,K. Daum,M. David,C. L. Davis,B. Delcourt,L. Del Buono,A. De Roeck,E. A. De Wolf,P. Dixon,P. Di Nezza,C. Dollfus,J. D. Dowell,H. B. Dreis,A. Droutskoi,J. Duboc,D. Düllmann,O. Dünger,H. Duhm,J. Ebert,T. R. Ebert, G. Eckerlin,V. Efremenko,S. Egli,H. Ehrlichmann,S. Eichenberger,R. Eichler, F. Eisele, E. Eisenhandler,R. J. Ellison,E. Elsen,M. Erdmann, W. Erdmann,E. Evrard,L. Favart,A. Fedotov,D. Feeken,R. Felst,J. Feltesse, J. Ferencei,F. Ferrarotto,K. Flamm,M. Fleischer,M. Flieser,G. Flügge,A. Fomenko,B. Fominykh,M. Forbush,J. Formánek,J. M. Foster,G. Franke,E. Fretwurst, E. Gabathuler, K. Gabathuler, J. Garvey,J. Gayler,M. Gebauer,A. Gellrich,H. Genzel,R. Gerhards,A. Glazov, U. Goerlach,L. Goerlich,N. Gogitidze,M. Goldberg,D. Goldner, B. Gonzalez-Pineiro,I. Gorelov,P. Goritchev,C. Grab,H. Grässler,R. Grässler, T. Greenshaw,R. K. Griffiths,G. Grindhammer, A. Gruber,C. Gruber,J. Haack,D. Haidt,L. Hajduk,O. Hamon,M. Hampel,M. Hapke,W. J. Haynes, G. Heinzelmann, R. C. W. Henderson,H. Henschel,I. Herynek,M. F. Hess,W. Hildesheim,P. Hill,K. H. Hiller,C. D. Hilton,J. Hladký,K. C. Hoeger,M. Höppner, R. Horisberger,V. L. Hudgson, P. Huet,M. Hütte,H. Hufnagel, M. Ibbotson,H. Itterbeck, M.-A. Jabiol, A. Jacholkowska,C. Jacobsson,M. Jaffre,J. Janoth,T. Jansen,L. Jönsson,K. Johannsen,D. P. Johnson,L. Johnson,H. Jung,P. I. P. Kalmus,D. Kant,R. Kaschowitz,P. Kasselmann,U. Kathage, J. Katzy,H. H. Kaufmann,S. Kazarian,I. R. Kenyon,S. Kermiche,C. Keuker,C. Kiesling,M. Klein, C. Kleinwort,G. Knies,W. Ko,T. Köhler,J. H. Köhne,H. Kolanoski,F. Kole,S. D. Kolya,V. Korbel,M. Korn,P. Kostka,S. K. Kotelnikov,T. Krämerkämper, M. W. Krasny,H. Krehbiel,D. Krücker,U. Krüger,U. Krüner-Marquis,H. Küster,M. Kuhlen,T. Kurča,J. Kurzhöfer,B. Kuznik, D. Lacour,B. Laforge,F. Lamarche,R. Lander,M. P. J. Landon,W. Lange,P. Lanius,J.-F. Laporte, A. Lebedev,F. Lehner,C. Leverenz,S. Levonian,Ch. Ley,G. Lindström,J. Link,F. Linsel,J. Lipinski,B. List,G. Lobo,P. Loch,H. Lohmander,J. W. Lomas,G. C. Lopez,V. Lubimov,D. Lüke,N. Magnussen,E. Malinovski,S. Mani,R. Maraček, P. Marage,J. Marks, R. Marshall,J. Martens,G. Martin,R. Martin,H.-U. Martyn,J. Martyniak,S. Masson,T. Mavroidis, S. J. Maxfield, S. J. McMahon,A. Mehta,K. Meier,D. Mercer,T. Merz,A. Meyer,C. A. Meyer,H. Meyer,J. Meyer,P.-O. Meyer,A. Migliori,S. Mikocki,D. Milstead,F. Moreau,J. V. Morris,E. Mroczko,G. Müller,K. Müller,P. Murín,V. Nagovizin,R. Nahnhauer,B. Naroska,Th. Naumann, P. R. Newman,D. Newton,D. Neyret,H. K. Nguyen,T. C. Nicholls,F. Niebergall,C. Niebuhr,Ch. Niedzballa, R. Nisius,G. Nowak,G. W. Noyes,M. Nyberg-Werther,M. Oakden, H. Oberlack,U. Obrock,J. E. Olsson,D. Ozerov,P. Palmen,E. Panaro,A. Panitch,C. Pascaud,G. D. Patel,H. Pawletta,E. Peppel,E. Perez,J. P. Phillips,Ch. Pichler,A. Pieuchot, D. Pitzl,G. Pope,S. Prell,R. Prosi,K. Rabbertz,G. Rädel, F. Raupach,P. Reimer,S. Reinshagen,P. Ribarics,H. Rick,V. Riech,J. Riedlberger,S. Riess,M. Rietz,E. Rizvi,S. M. Robertson, P. Robmann,H. E. Roloff,R. Roosen,K. Rosenbauer,A. Rostovtsev,F. Rouse, C. Royon,K. Rüter,S. Rusakov,K. Rybicki,N. Sahlmann,D. P. C. Sankey, P. Schacht,S. Schiek,S. Schleif, P. Schleper,W. von Schlippe,D. Schmidt,G. Schmidt,A. Schöning,V. Schröder,E. Schuhmann,B. Schwab, C. Schwanenberger,G. Sciacca,F. Sefkow,M. Seidel,R. Sell,A. Semenov,V. Shekelyan,I. Sheviakov,L. N. Shtarkov,G. Siegmon,U. Siewert, Y. Sirois,I. O. Skillicorn,P. Smirnov,J. R. Smith,V. Solochenko,Y. Soloviev, J. Spiekermann,S. Spielman,H. Spitzer,R. Starosta,M. Steenbock,P. Steffen,R. Steinberg,B. Stella,K. Stephens,J. Stier, J. Stiewe,U. Stößlein,K. Stolze,J. Strachota, U. Straumann,W. Struczinski,J. P. Sutton, S. Tapprogge, V. Tchernyshov,J. Theissen,C. Thiebaux,G. Thompson, P. Truöl,J. Turnau,J. Tutas,P. Uelkes,A. Usik, S. Valkár,A. Valkárová,C. Vallée,D. Vandenplas,P. Van Esch,P. Van Mechelen, A. Vartapetian,Y. Vazdik, P. Verrecchia,G. Villet,K. Wacker,A. Wagener,M. Wagener,A. Walther,B. Waugh,G. Weber, M. Weber, D. Wegener,A. Wegner,H. P. Wellisch,L. R. West,S. Willard,M. Winde,G.-G. Winter,C. Wittek,A. E. Wright,E. Wünsch,N. Wulff,T. P. Yiou,J. Žáček,D. Zarbock,Z. Zhang, A. Zhokin,M. Zimmer,W. Zimmermann,F. Zomer,J. Zsembery,K. Zuber,M. zurNedden

European Physical Journal C（1996）

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摘要

Properties of the hadronic final state in photoproduction events with large transverse energy are studied at the electron-proton collider HERA. Distributions of the transverse energy, jets and underlying event energy are compared to$$\bar pp$$ data and QCD calculations. The comparisons show that theγp events can be consistently described by QCD models including — in addition to the primary hard scattering process — interactions between the two beam remnants. The differential jet cross sectionsdσ/dE Tjet anddσ/dη jet are measured.

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关键词

cross section,energy flow

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