A search for leptoquarks and squarks at HERA

T. Ahmed,S. Aid,V. Andreev,B. Andrieu,R. -D. Appuhn,M. Arpagaus,A. Babaev,J. Baehr,J. Bán,P. Baranov,E. Barrelet,W. Bartel,M. Barth,U. Bassler,H. P. Beck,H. -J. Behrend,A. Belousov,Ch. Berger,H. Bergstein,G. Bernardi,R. Bernet,G. Bertrand-Coremans,M. Besançon,R. Beyer,P. Biddulph,J. C. Bizot,V. Blobel,K. Borras,F. Botterweck,V. Boudry,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,G. Buschhorn,A. J. Campbell,T. Carli,F. Charles,D. Clarke,A. B. Clegg,M. Colombo,J. G. Contreras,J. A. Coughlan,A. Courau,Ch. Coutures,G. Cozzika,L. Criegee,D. G. Cussans,J. Cvach,S. Dagoret,J. B. Dainton,M. Danilov,W. D. Dau,K. Daum,M. David,E. Deffur,B. Delcourt,L. Del Buono,A. De Roeck,E. A. De Wolf,P. Di Nezza,C. Dollfus,J. D. Dowell,H. B. Dreis,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,K. Gamerdinger,J. Garvey,J. Gayler,M. Gebauer,A. Gellrich,H. Genzel,R. Gerhards,U. Goerlach,L. Goerlich,N. Gogitidze,M. Goldberg,D. Goldner,B. Gonzalez-Pineiro,A. M. Goodall,I. Gorelov,P. Goritchev,C. Grab,H. Grässler,R. Grässler,T. Greenshaw,G. Grindhammer,A. Gruber,C. Gruber,J. Haack,D. Haidt,L. Hajduk,O. Hamon,M. Hampel,E. M. Hanlon,M. Hapke,W. J. Haynes,J. Heatherington,V. Hedberg,G. Heinzelmann,R. C. W. Henderson,H. Henschel,R. Herma,I. Herynek,M. F. Hess,W. Hildesheim,P. Hill,K. H. Hiller,C. D. Hilton,J. Hladký,K. C. Hoeger,M. Höppner,R. Horisberger,Ph. Huet,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,H. H. Kaufmann,S. Kazarian,I. R. Kenyon,S. Kermiche,C. Keuker,C. Kiesling,M. Klein,C. Kleinwort,G. Knies,W. Ko,T. Köhler,H. Kolanoski,F. Kole,S. D. Kolya,V. Korbel,M. Korn,P. Kostka,S. K. Kotelnikov,M. W. Krasny,H. Krehbiel,D. Krücker,U. Krüger,U. Krüner-Marquis,J. P. Kubenka,H. Küster,M. Kuhlen,T. Kurča,J. Kurzhöfer,B. Kuznik,D. Lacour,F. Lamarche,R. Lander,M. P. J. Landon,W. Lange,P. Lanius,J. -F. Laporte,A. Lebedev,C. Leverenz,S. Levonian,Ch. Ley,A. Lindner,G. Lindström,F. Linsel,J. Lipinski,B. List,P. Loch,H. Lohmander,G. C. Lopez,D. Lüke,N. Magnussen,E. Malinovski,S. Mani,R. Maraček,P. Marage,J. Marks,R. Marshall,J. Martens,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,C. A. Meyer,H. Meyer,J. Meyer,S. Mikocki,D. Milstead,F. Moreau,J. V. Morris,G. Müller,K. Müller,P. Murín,V. Nagovizin,R. Nahnhauer,B. Naroska,Th. Naumann,P. R. Newman,D. Newton,D. Neyret,H. K. Nguyen,F. Niebergall,C. Niebuhr,R. Nisius,G. Nowak,G. W. Noyes,M. Nyberg-Werther,H. Oberlack,U. Obrock,J. E. Olsson,E. Panaro,A. Panitch,C. Pascaud,G. D. Patel,E. Peppel,E. Perez,J. P. Phillips,Ch. Pichler,D. Pitzl,G. Pope,S. Prell,R. Prosi,G. Rädel,F. Raupach,P. Reimer,S. Reinshagen,P. Ribarics,V. Riech,J. Riedlberger,S. Riess,M. Rietz,S. M. Robertson,P. Robmann,H. E. Roloff,R. Roosen,K. Rosenbauer,A. Rostovtsev,F. Rouse,C. Royon,K. Rüter,S. Rusakov,K. Rybicki,R. Rylko,N. Sahlmann,E. Sanchez,D. P. C. Sankey,M. Savitsky,P. Schacht,S. Schiek,P. Schleper,W. von Schlippe,C. Schmidt,D. Schmidt,G. Schmidt,A. Schöning,V. Schröder,E. Schuhmann,B. Schwab,A. Schwind,U. Seehausen,F. Sefkow,M. Seidel,R. Sell,A. Semenov,V. Shekelyan,I. Sheviakov,H. Shooshtari,L. N. Shtarkov,G. Siegmon,U. Siewert,Y. Sirois,I. O. Skillicorn,P. Smirnov,J. R. Smith,Y. Soloviev,H. Spitzer,R. Starosta, M. Steenbock,P. Steffen,R. Steinberg,B. Stella,K. Stephens,J. Stier,J. Stiewe,U. Stösslein,J. Strachota,U. Straumann,W. Struczinski,J. P. Sutton,S. Tapprogge,R. E. Taylor,V. Tchernyshov,C. Thiebaux,G. Thompson,I. Tichomirov,P. Truöl,J. Turnau,J. Tutas,P. Uelkes,A. Usik,S. Valkár,A. Valkárová,C. Vallée,P. Van Esch,P. Van Mechelen,A. Vartapetian,Y. Vazdik,M. Vecko,P. Verrecchia,G. Villet,K. Wacker,A. Wagener,M. Wagener,I. W. Walker,A. Walther,G. Weber,M. Weber,D. Wegener,A. Wegner,H. P. Wellisch,L. R. West,S. Willard,M. Winde,G. -G. Winter,A. E. Wright,E. Wünsch,N. Wulff,T. P. Yiou,J. Žáček,D. Zarbock,Z. Zhang,M. Zimmer,W. Zimmermann,F. Zomer,K. Zuber, Hl Collaboration

European Physical Journal C（1994）

Cited 70|Views130

No score

Abstract

A search in the H1 experiment at HERA for scalar and vector leptoquarks, leptogluons and squarks coupling to first generation fermions is presented in a data sample corresponding to an integrated luminosity of 425 nb−1. For masses ranging up to ∼275 GeV, no significant evidence for the direct production of such particles is found in various possible decay channels. At high masses and beyond the centre of mass energy of 296 GeV a contact interaction analysis is used to further constrain the couplings and masses of new vector leptoquarks and to set lower limits on compositeness scales.

Translated text

Key words

Field Theory, Elementary Particle, Lower Limit, Quantum Field Theory, Direct Production

AI Read Science

Must-Reading Tree

Example

Generate MRT to find the research sequence of this paper

Chat Paper

Summary is being generated by the instructions you defined