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Three-Jet Production in Deep-Inelastic Scattering at HERA

C. Adloff V. Andreev B. Andrieu 1 T. Anthonis V. Arkadov A. Astvatsatourov I. Ayyaz A. Babaev J. Bahr P. Baranov E. Barrelet 2 W. Bartel P. Bate A. Beglarian O. Behnke C. Beier A. Belousov T. Benisch Christoph. Berger T. Berndt J.C. Bizot 3 V. Boudry 1 W. Braunschweig V. Brisson 3 H.B. Broker D.P. Brown W. Bruckner Pascal Bruel D. Bruncko J. Burger F.W. Busser A. Bunyatyan Hans Burkhardt A. Burrage G. Buschhorn A.J. Campbell J. Cao T. Carli S. Caron D. Clarke B. Clerbaux C. Collard J.G. Contreras Y.R. Coppens J.A. Coughlan M.C. Cousinou 4 B.E. Cox G. Cozzika J. Cvach J.B. Dainton W.D. Dau K. Daum M. Davidsson B. Delcourt 3 N. Delerue 4 R. Demirchyan A. de Roeck E.A. de Wolf C. Diaconu 4 J. Dingfelder P. Dixon V. Dodonov J.D. Dowell A. Droutskoi A. Dubak C. Duprel G. Eckerlin D. Eckstein V. Efremenko S. Egli R. Eichler F. Eisele E. Eisenhandler M. Ellerbrock E. Elsen M. Erdmann W. Erdmann L. Favart A. Fedotov R. Felst J. Ferencei S. Ferron 1 M. Fleischer Y.H. Fleming G. Flugge A. Fomenko I. Foresti J. Formanek J.M. Foster G. Franke E. Gabathuler K. Gabathuler J. Garvey J. Gassner J. Gayler R. Gerhards C. Gerlich S. Ghazaryan L. Goerlich N. Gogitidze M. Goldberg C. Goodwin C. Grab H. Grassler T. Greenshaw G. Grindhammer T. Hadig D. Haidt L. Hajduk W.J. Haynes B. Heinemann G. Heinzelmann A. Heister R.C.W. Henderson S. Hengstmann H. Henschel R. Heremans G. Herrera I. Herynek M. Hildebrandt M. Hilgers K.H. Hiller J. Hladky P. Hoting D. Hoffmann R. Horisberger S. Hurling M. Ibbotson M. Jacquet 3 M. Jaffre 3 L. Janauschek D.M. Jansen X. Janssen V. Jemanov L. Jonsson D.P. Johnson M.A.S. Jones H. Jung H.K. Kastli D. Kant M. Kapichine M. Karlsson O. Karschnick F. Keil N. Keller J. Kennedy I.R. Kenyon S. Kermiche 4 C. Kiesling P. Kjellberg M. Klein C. Kleinwort G. Knies B. Koblitz S.D. Kolya V. Korbel P. Kostka S.K. Kotelnikov R. Koutouev A. Koutov M.W. Krasny H. Krehbiel J. Kroseberg K. Kruger A. Kupper T. Kuhr T. Kurca R. Lahmann D. Lamb M.P.J. Landon W. Lange T. Lastovicka P. Laycock E. Lebailly 3 A. Lebedev B. Leiner R. Lemrani V. Lendermann S. Levonian 1 M. Lindstroem B. List E. Lobodzinska B. Lobodzinski A. Loginov N. Loktionova V. Lubimov S. Luders D. Luke L. Lytkin N. Magnussen H. Mahlke-Kruger N. Malden E. Malinovski I. Malinovski R. Maracek P. Marage J. Marks R. Marshall H.U. Martyn J. Martyniak S.J. Maxeld D. Meer A. Mehta K. Meier P. Merkel A.B. Meyer H. Meyer J. Meyer 1 P.O. Meyer S. Mikocki D. Milstead T. Mkrtchyan R. Mohr S. Mohrdieck M.N. Mondragon F. Moreau 1 A. Morozov J.V. Morris K. Muller P. Murn V. Nagovizin B. Naroska J. Naumann T. Naumann G. Nellen P.R. Newman T.C. Nicholls F. Niebergall C. Niebuhr O. Nix G. Nowak T. Nunnemann J.E. Olsson D. Ozerov V. Panassik C. Pascaud 3 G.D. Patel M. Peez 4 Emile Perez J.P. Phillips D. Pitzl R. Poschl I. Potachnikova B. Povh K. Rabbertz G. Radel J. Rauschenberger P. Reimer B. Reisert D. Reyna S. Riess C. Risler E. Rizvi P. Robmann R. Roosen A. Rostovtsev C. Royon S. Rusakov K. Rybicki D.P.C. Sankey J. Scheins F.P. Schilling P. Schleper D. Schmidt S. Schmitt M. Schneider 4 L. Schoeffel A. Schoning T. Schorner V. Schroder H.C. Schultz-Coulon C. Schwanenberger K. Sedlak F. Sefkow V. Shekelyan I. Sheviakov L.N. Shtarkov Y. Sirois 1 T. Sloan P. Smirnov V. Solochenko Y. Soloviev V. Spaskov A. Specka 1 H. Spitzer R. Stamen J. Steinhart B. Stella A. Stellberger J. Stiewe U. Straumann W. Struczinski M. Swart M. Tasevsky V. Tchernyshov S. Tchetchelnitski G. Thompson P.D. Thompson N. Tobien D. Traynor P. Truol G. Tsipolitis I. Tsurin J. Turnau J.E. Turney E. Tzamariudaki S. Udluft A. Usik S. Valkar A. Valkarova C. Vallee 4 P. van Mechelen S. Vassiliev Y. Vazdik A. Vichnevski K. Wacker R. Wallny T. Walter B. Waugh G. Weber M. Weber D. Wegener M. Werner N. Werner G. White S. Wiesand T. Wilksen M. Winde G.G. Winter C. Wissing M. Wobisch H. Wollatz E. Wunsch A.C. Wyatt J. Zacek J. Zalesak Zhiqing Zhang 3 A. Zhokin F. Zomer 3 J. Zsembery M. Zur Nedden
Abstract : Three-jet production is studied for the first time in deep-inelastic positron-proton scattering. The measurement carried out with the H1 detector at HERA covers a large range of four-momentum transfer squared 5 Q^2 5000 GeV^2 and invariant three-jet masses 25 M_(3jet) 140 GeV. Jets are defined by the inclusive k_T algorithm in the Breit frame. The size of the three-jet cross section and the ratio of the three-jet to the dijet cross section R_(3/2) are described over the whole phase space by the predictions of perturbative QCD in next-to-leading order. The shapes of angular jet distributions deviate significantly from a uniform population of the available phase space but are well described by the QCD calculation.
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Submitted on : Tuesday, September 4, 2001 - 10:42:56 AM
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C. Adloff, V. Andreev, B. Andrieu, T. Anthonis, V. Arkadov, et al.. Three-Jet Production in Deep-Inelastic Scattering at HERA. Physics Letters B, Elsevier, 2001, 515, pp.17-29. ⟨in2p3-00010390⟩

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