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Measurement of Internal Jet Structure in Dijet Production in Deep-Inelastic Scattering at HERA

C. Adloff V. Andreev B. Andrieu 1 V. Arkadov A. Astvatsatourov I. Ayyaz 2 A. Babaev J. Bahr P. Baranov E. Barrelet 2 W. Bartel U. Bassler 2 P. Bate A. Beglarian O. Behnke H.J. Behrend C. Beier A. Belousov C. Berger G. Bernardi 2 T. Berndt G. Bertrand-Coremans P. Biddulph J.C. Bizot 3 V. Boudry 1 W. Braunschweig V. Brisson 3 D.P. Brown W. Bruckner Pascal Bruel D. Bruncko J. Burger F.W. Busser A. Buniatian S. Burke G. Buschhorn D. Calvet 4 A.J. Campbell T. Carli E. Chabert 4 M. Charlet D. Clarke B. Clerbaux S. Cocks J.G. Contreras C. Cormack J.A. Coughlan M.C. Cousinou 4 B.E. Cox G. Cozzika J. Cvach J.B. Dainton W.D. Dau K. Daum M. David M. Davidsson A. de Roeck E.A. de Wolf B. Delcourt 3 R. Demirchian C. Diaconu 4 M. Dirkmann P. Dixon W. Dlugosz K.T. Donovan J.D. Dowell A. Droutskoi J. Ebert G. Eckerlin D. Eckstein V. Efremenko S. Egli R. Eichler F. Eisele E. Eisenhandler E. Elsen M. Enzenberger M. Erdmann A.B. Fahr L. Favart 3 A. Fedotov R. Felst J. Feltesse J. Ferencei F. Ferrarotto M. Fleischer G. Flugge A. Fomenko J. Formanek J.M. Foster G. Franke E. Gabathuler K. Gabathuler F. Gaede J. Garvey J. Gassner J. Gayler R. Gerhards S. Ghazaryan A. Glazov L. Goerlich N. Gogitidze M. Goldberg 2 I. Gorelov C. Grab H. Grassler T. Greenshaw R.K. Griffiths G. Grindhammer T. Hadig D. Haidt L. Hajduk M. Hampel V. Haustein W.J. Haynes B. Heinemann G. Heinzelmann R.C.W. Henderson S. Hengstmann H. Henschel R. Heremans I. Herynek K. Hewitt K.H. Hiller C.D. Hilton J. Hladky D. Hoffmann T. Holtom R. Horisberger S. Hurling M. Ibbotson C. Issever M. Jacquet 3 M. Jaffre 3 D.M. Jansen L. Joensson D.P. Johnson H. Jung H.K. Kastli M. Kander D. Kant M. Kapichine M. Karlsson O. Karschnik J. Katzy O. Kaufmann M. Kausch N. Keller I.R. Kenyon S. Kermiche 4 C. Keuker C. Kiesling M. Klein C. Kleinwort G. Knies J.H. Kohne H. Kolanoski S.D. Kolya V. Korbel P. Kostka S.K. Kotelnikov T. Kramerkamper M.W. Krasny 2 H. Krehbiel D. Krucker K. Kruger A. Kupper H. Kuster M. Kuhlen T. Kurca W. Lachnit R. Lahmann D. Lamb M.P.J. Landon W. Lange U. Langenegger A. Lebedev F. Lehner V. Lemaitre R. Lemrani V. Lendermann S. Levonian M. Lindstroem G. Lobo 3 E. Lobodzinska V. Lubimov S. Luders D. Luke L. Lytkin N. Magnussen H. Mahlke-Kruger N. Malden E. Malinovskii I. Malinovski R. Maracek P. Marage J. Marks R. Marshall H.U. Martyn J. Martyniak S.J. Maxfield S.J. Mcmahon T.R. Mcmahon A. Mehta K. Meier P. Merkel F. Metlica A. Meyer H. Meyer J. Meyer P.O. Meyer S. Mikocki D. Milstead R. Mohr S. Mohrdieck M. Mondragon F. Moreau 1 A. Morozov J.V. Morris D. Muller K. Muller P. Murin V. Nagovizin B. Naroska J. Naumann T. Naumann I. Negri 4 P.R. Newman H.K. Nguyen 2 T.C. Nicholls F. Niebergall C. Niebuhr C. Niedzballa H. Niggli O. Nix G. Nowak T. Nunnemann H. Oberlack J.E. Olsson D. Ozerov P. Palmen V. Panassik C. Pascaud 3 S. Passaggio G.D. Patel H. Pawletta Emile Perez J.P. Phillips A. Pieuchot 4 D. Pitzl R. Poschl G. Pope B. Povh K. Rabbertz J. Rauschenberger P. Reimer B. Reisert D. Reyna H. Rick S. Riess E. Rizvi P. Robmann R. Roosen K. Rosenbauer A. Rostovtsev 2 F. Rouse C. Royon S. Rusakov K. Rybicki D.P.C. Sankey P. Schacht J. Scheins F.P. Schilling S. Schleif P. Schleper D. Schmidt L. Schoeffel V. Schroder H.C. Schultz-Coulon F. Sefkow A. Semenov V. Shekelian I. Shevyakov L.N. Shtarkov G. Siegmon Y. Sirois 1 T. Sloan P. Smirnov M. Smith V. Solochenko Yu. Solovev L. Sonnenschein V. Spaskov A. Specka 1 H. Spitzer F. Squinabol 3 R. Stamen P. Steffen R. Steinberg J. Steinhart B. Stella A. Stellberger J. Stiewe U. Straumann W. Struczinski J.P. Sutton M. Swart S. Tapprogge M. Tasevsky V. Chernyshov S. Chechelnitskii J. Theissen G. Thompson P.D. Thompson N. Tobien R. Todenhagen D. Traynor P. Truol G. Tsipolitis J. Turnau E. Tzamariudaki S. Udluft A. Usik S. Valkar A. Valkarova C. Vallee 4 P. van Esch A. van Haecke P. van Mechelen Ya. Vazdik G. Villet K. Wacker R. Wallny T. Walter B. Waugh G. Weber M. Weber D. Wegener A. Wegner T. Wengler M. Werner L.R. West S. Wiesand T. Wilksen S. Willard M. Winde G.G. Winter C. Wissing C. Wittek E. Wittmann M. Wobisch H. Wollatz E. Wunsch J. Zacek J. Zalesak Zhiqing Zhang 3 A. Zhokin P. Zini 2 F. Zomer 3 J. Zsembery M. Zur Nedden
Abstract : Internal jet structure in dijet production in deep-inelastic scattering is measured with the H1 detector at HERA. Jets with transverse energies ET,Breit 5 GeV are selected in the Breit frame employing k_perp and cone jet algorithms. In the kinematic region of squared momentum transfers 10 Q2 ~ 120 GeV2 and x-Bjorken values 2.10^-4 ~ xBj ~ 8.10^-3, jet shapes and subjet multiplicities are measured as a function of a resolution parameter. Distributions of both observables are corrected for detector effects and presented as functions of the transverse jet energy and jet pseudo-rapidity. Dependences of the jet shape and the average number of subjets on the transverse energy and the pseudo-rapidity of the jet are observed. With increasing transverse jet energies and decreasing pseudo-rapidities, i.e.towards the photon hemisphere, the jets are more collimated. QCD models give a fair description of the data.
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Submitted on : Thursday, May 27, 1999 - 4:18:12 PM
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C. Adloff, V. Andreev, B. Andrieu, V. Arkadov, A. Astvatsatourov, et al.. Measurement of Internal Jet Structure in Dijet Production in Deep-Inelastic Scattering at HERA. Nuclear Physics B, Elsevier, 1999, 545, pp.3-20. ⟨in2p3-00014414⟩

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