Search For Resonance Decays To Lepton Plus Jet At Desy Hera And Limits On Leptoquarks

S. Chekanov,M. Derrick,D. Krakauer,J. Loizides,S. Magill,B. Musgrave,J. Repond,R. Yoshida,M. Mattingly,P. Antonioli,G. Bari,M. Basile,L. Bellagamba, D. Boscherini,A. Bruni,G. Bruni,G. Cara Romeo, L. Cifarelli,F. Cindolo,A. Contin,M. Corradi,S. De Pasquale,P. Giusti,G. Iacobucci, A. Margotti,R. Nania, F. Palmonari,A. Pesci, G. Sartorelli, A. Zichichi,G. Aghuzumtsyan,D. Bartsch, I. Brock,S. Goers,H. Hartmann,E. Hilger,P. Irrgang,H.-P. Jakob,A. Kappes,U. Katz, O. Kind,U. Meyer,E. Paul,J. Rautenberg,R. Renner,H. Schnurbusch,A. Stifutkin,J. Tandler,K. Voss,M. Wang,A. Weber,D. Bailey,N. Brook,J. Cole,B. Foster,G. Heath,H. Heath,S. Robins,E. Rodrigues, J. Scott,R. Tapper,M. Wing,M. Capua,A. Mastroberardino,M. Schioppa,G. Susinno,J. Kim,Y. Kim,J. Lee,I. Lim,M. Pac,A. Caldwell,M. Helbich,X. Liu,B. Mellado,Y. Ning,S. Paganis,Z. Ren,W. Schmidke,F. Sciulli,J. Chwastowski,A. Eskreys,J. Figiel,K. Olkiewicz,P. Stopa,L. Zawiejski,L. Adamczyk,T. Bołd,I. Grabowska-Bołd, D. Kisielewska,A. Kowal,M. Kowal,T. Kowalski,M. Przybycień,L. Suszycki, D. Szuba,J. Szuba,A. Kotański,W. Słomiński,V. Adler,L. Bauerdick, U. Behrens, I. Bloch, K. Borras,V. Chiochia,D. Dannheim,G. Drews,J. Fourletova,U. Fricke, A. Geiser,F. Goebel,P. Göttlicher,O. Gutsche,T. Haas,W. Hain, G. Hartner, S. Hillert,B. Kahle,U. Kötz,H. Kowalski, G. Kramberger,H. Labes,D. Lelas,B. Löhr, R. Mankel, I.-A. Melzer-Pellmann,M. Moritz,C. Nguyen,D. Notz,M. Petrucci,A. Polini,A. Raval,U. Schneekloth,F. Selonke,H. Wessoleck,G. Wolf,C. Youngman, W. Zeuner,S. Schlenstedt, G. Barbagli, E. Gallo,C. Genta,P. Pelfer,A. Bamberger,A. Benen,N. Coppola,M. Bell, P. Bussey,A. Doyle,C. Glasman,J. Hamilton,S. Hanlon,S. Lee,A. Lupi,D. Saxon,I. Skillicorn,I. Gialas,B. Bodmann, T. Carli,U. Holm,K. Klimek, N. Krumnack,E. Lohrmann,M. Milite,H. Salehi, S. Stonjek,K. Wick,A. Ziegler,Ar. Ziegler, C. Collins-Tooth, C. Foudas,R. Gonçalo,K. Long,A. Tapper,P. Cloth,D. Filges,M. Kuze,K. Nagano, K. Tokushuku, S. Yamada,Y. Yamazaki,A. Barakbaev, E. Boos,N. Pokrovskiy,B. Zhautykov,H. Lim,D. Son,K. Piotrzkowski,F. Barreiro,O. González, L. Labarga,J. del Peso,E. Tassi, J. Terrón,M. Vázquez,M. Barbi,F. Corriveau,S. Gliga,J. Lainesse,S. Padhi,D. Stairs,T. Tsurugai,A. Antonov,P. Danilov,B. Dolgoshein,D. Gladkov,V. Sosnovtsev,S. Suchkov,R. Dementiev,P. Ermolov,Yu. Golubkov, I. Katkov,L. Khein,I. Korzhavina,V. Kuzmin,B. Levchenko,O. Lukina,A. Proskuryakov,L. Shcheglova,N. Vlasov,S. Zotkin, N. Coppola,S. Grijpink, E. Koffeman,P. Kooijman,E. Maddox,A. Pellegrino,S. Schagen,H. Tiecke,J. Velthuis,L. Wiggers,E. de Wolf,N. Brümmer, B. Bylsma,L. Durkin,T. Ling,A. Cooper-Sarkar,A. Cottrell,R. Devenish,J. Ferrando,G. Grzelak,S. Patel,M. Sutton, R. Walczak,A. Bertolin,R. Brugnera,R. Carlin,F. Dal Corso,S. Dusini,A. Garfagnini,S. Limentani,A. Longhin,A. Parenti,M. Posocco,L. Stanco,M. Turcato,E. Heaphy,F. Metlica,B. Oh, J. Whitmore,Y. Iga,G. D’Agostini,G. Marini, A. Nigro,C. Cormack,J. Hart,N. McCubbin, C. Heusch,I. Park,N. Pavel, H. Abramowicz,A. Gabareen,S. Kananov,A. Kreisel,A. Levy,T. Abe,T. Fusayasu,S. Kagawa,T. Kohno,T. Tawara,T. Yamashita,R. Hamatsu,T. Hirose,M. Inuzuka,S. Kitamura,K. Matsuzawa,T. Nishimura,M. Arneodo,M. Ferrero, V. Monaco, M. Ruspa, R. Sacchi, A. Solano,T. Koop,G. Levman,J. Martin,A. Mirea,J. Butterworth,C. Gwenlan,R. Hall-Wilton,T. Jones,M. Lightwood,B. West,J. Ciborowski,R. Ciesielski,R. Nowak,J. Pawlak,J. Sztuk,T. Tymieniecka,A. Ukleja,J. Ukleja,A. Żarnecki,M. Adamus,P. Plucinski,Y. Eisenberg,L. Gladilin,D. Hochman,U. Karshon,D. Kçira, S. Lammers,L. Li,D. Reeder, A. Savin,W. Smith,A. Deshpande,S. Dhawan,V. Hughes,P. Straub,S. Bhadra,C. Catterall,S. Fourletov,G. Hartner, S. Menary,M. Soares,J. Standage

PHYSICAL REVIEW D（2003）

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摘要

A search for narrow-width resonances that decay into electron+jet or neutrino+jet has been performed with the ZEUS detector at the DESY ep collider HERA operating at center-of-mass energies of 300 and 318 GeV. An integrated e(+)p luminosity of 114.8 pb(-1) and e(-)p luminosity of 16.7 pb(-1) were used. No evidence for any resonance was found. Limits were derived on the Yukawa coupling lambda as a function of the mass of a hypothetical resonance that has arbitrary decay branching ratios into eq or nuq. These limits also apply to squarks predicted by R-parity-violating supersymmetry. Limits for the production of leptoquarks described by the Buchmuller-Ruckl-Wyler model were also derived for masses up to 400 GeV. For lambda=0.1, leptoquark masses up to 290 GeV are excluded.

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standard model,construction,deep inelastic scattering

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