Search for Second Generation Leptoquarks in the Dimuon Plus Dijet Channel ofpp¯Collisions at√s=1.8TeV

F Abe,A Gordon,S Donati,P De Barbaro,D Carlsmith,T Arisawa,W K Sakumoto,K Biery,C Bromberg,F Rimondi,M Mariotti,P K Teng,S Bettelli,D Cronin-Hennessy,T Kikuchi,K Burkett,A Byon-Wagner,P T Chang,S Lami,J Kroll,C Grosso-Pilcher,T Ohsugi,K Goulianos,H Grassmann,Q Fan,Y Bonushkin,J E Elias,P F Shepard,B Hinrichsen,P Limon,H Ikeda,J Cassada,R G Wagner,C Haber,S H Oh,S Tether,S Behrends,M Musy,D Amidei,P Schlabach,N M Shaw,W C Wester,G P Yeh,W J Robertson,D Kestenbaum,H Frisch,X Wu,J Siegrist,C Pagliarone,H Akimoto,B A Barnett,T Suzuki,H Wenzel,M Lancaster,T Okusawa,L Demortier,D Saltzberg,A Bodek,G Introzzi,C H Wang,K Hara,N B Wallace,A Amadon,H Toyoda,P Giromini,F Zetti,G Martignon,J Boudreau,S R Amendolia,R Vilar,A Caner,E Kuns,L Nodulman,S Murgia,A Köngeter,S Cihangir,T Watts,T Daniels,L Santi,A Barbaro-Galtieri,D Wolinski,S Tkaczyk,G Michail,J P Marriner,F Semeria,B T Huffman,V Papadimitriou,D Knoblauch,M Tecchio,T L Thomas,T Takano,P Giannetti,G Latino,T Devlin,A Bhatti,R G Feild,N Eddy,E Hafen,J Wolinski,R Brunetti,J Done,T Miao,S Bertolucci,N Turini,G Punzi,G Pauletta,R Oishi,M Franklin,D Winn,W Kowald,S E Kuhlmann,M Cordelli,O Ganel,R E Blair,V E Barnes,Y K Kim,L Holloway,A Nomerotski,M Lanzoni,K Kondo,K Sumorok,J Cooper,A Menzione,A Korytov,R Culbertson,S Blusk,S R Hahn,M Mishina,J Spalding,K Kelley,I Nakano,Y Seiya,S Rolli,S Leone,S H Kim,K Yasuoka,F Ptohos,F Bedeschi,P Singh,L Rosenson,A M Walsh,J I Lamoureux,R D Kennedy,S Geer,H Kasha,J Wyss,L Pondrom,S Metzler,J Huth,K Karr,A Sill,R Wilkinson,T A Keaffaber,J Conway,D Benjamin,F Happacher,T Kaneko,Y Gotra,D Dagenhart,S Segler,S Zucchelli,E Cocca,F Hartmann,M Paulini,A Scribano,B Tannenbaum,G Busetto,S C Van Den Brink,R Hamilton,P Tipton,S Belforte,G Guillian,S Miyashita,P Lukens,E Kajfasz,Y Fukui,F Spinella,E Kovacs,K Ragan,D Lucchesi,W Carithers,K D Hoffman,T Handa,J Friedman,C N Chiou,C Holck,M Deninno,R Paoletti,Y Morita,U Joshi,S Gadomski,F D Snider,M P Schmidt,B Bevensee,M Lindgren,S Lusin,S Galeotti,R Ely,J Proudfoot,S Miscetti,Y Teramoto,M Okabe,J Yoh,L Groer,L Breccia,A B Wicklund,G Bauer,K Sliwa,R Roser,M Gold,C Couyoumtzelis,T M Liss,K Kurino,J Steele,R M Harris,S Aota,G Piacentino,H S Budd,D Stuart,J B Liu,F Ukegawa,A Akopian,P Mcintyre,D Cauz,P Koehn,A Tollestrup,K L Byrum,J Valls,H H Williams,E Hayashi,S Bagdasarov,W Ashmanskas,J Patrick,M L Chu,T Uchida,J Lys,E Buckley-Geer,C Blocker,P Murat,W Bokhari,B Flaugher,J Freeman,M Menguzzato,R Ströhmer,A Ribon,N Bruner,C Wang,C Loomis,I Fiori,D Neuberger,E Engels,P Sinervo,D Vucinic,J Iwai,R Takashima,A T Laasanen,C Yosef,A Castro,P Mazzanti,D Khazins,P Yeh,L Pescara,D Theriot,M Shimojima,M Binkley,S Vejcik,J Olsen,R Vidal,C Miao,L Ristori,M Garcia-Sciveres,D Reher,A D Hardman,C Newman-Holmes,S Errede,K Takikawa,J Incandela,D Toback,E Wicklund,T Kuwabara,N Moggi,M Incagli,G Velev,A Parri,W Trischuk,T Shibayama,F Strumia,D W Gerdes,J Huston,M Barone,P F Derwent,A Sansoni,J D Lewis,Y Kato,R L Wagner,T Speer,S Lammel,W Hao,M Contreras,G Bolla,J P Berge,K Tollefson,H Jensen,S Truitt,H Minato,S Klimenko,M Loreti,R Handler,G W Foster,M Campbell,M Mangano,P S Chang,E James,I Yu,T J Phillips,T Asakawa,H Nakada,M Chertok,E E Schmidt,W Erdmann,D Errede,N Giokaris,T Rodrigo,A Mukherjee,A T Goshaw,K Einsweiler,Y Iwata,L Christofek,P Wilson,F Chlebana,S P Pappas,R Kephart,E F Moore ,C Ferretti,Charles A Nelson ,H Kambara,A Beretvas,L Spiegel,N S Lockyer ,M Hohlmann,G F Tartarelli ,J Strologas,G Bellettini,M Cobal,P Mélèse ,J Tseng,B L Winer,O R Long ,R Démina ,A Stefanini,J Bellinger,P Maksimović ,R Webb,W Taylor,J Dittmann ,M Albrow ,N Parashar,Takashi Watanabe ,W-M Yao ,Tom Le Compte ,L Stančo ,A Pompoš ,T Ohmoto,J W Berryhill ,Z Feng,J Hauser,M Ataç ,S D Worm ,A Scott,A Clark ,H S Kim,A Yagil,B J Kim,H Sato,C Y.p Ngan ,D Bortoletto,J Matthews ,C Wei,Thomas Baumann ,M W Bailey,D Costanzo,M Dell’orso ,M Spiropulu,R Thurman‐Keup ,J Königsberg ,A Zanetti,A Cerri,J Chapman,C Smith,R S Guo ,R Miller,C Bigongiari,T Saab,H D Wahl ,M Timko,G Giusti,R Hollebeek,J Guimarães Da Costa ,R Hughes,Y C Liu,S C Seidel ,J Antos̆ ,G Apollinari,K Terashi,Junya Suzuki ,Th Müller ,A Perazzo,D Bisello,F De Jongh ,Zheng Huang ,H Y Chao,Jorge F De Trocóniz ,J R Bensinger ,K Kordas,T Kamon,M Kruse,N Bacchetta,T Yoshida,S Dell’agnello ,T Takahashi,Michael Peters ,M Pillai,M Shochet,A F Garfinkel,M Tanaka,R Plunkett,J Heinrich,E Meschi,K Maeshima,M T Cheng ,T Shah,A Warburton,A Titov,L Kirsch,K Pitts ,G Chiarelli,T Dorigo,P Azzi ,M Shapiro ,M Gallinaro,A Martín ,P Sphicas,M J Wang,Markus Reischl

doi:10.1103/physrevlett.81.4806

Abstract

We report on a search for second generation leptoquarks (Phi_2) using a data sample corresponding to an integrated luminosity of 110 pb^{-1} collected at the Collider Detector at Fermilab. We present upper limits on the production cross section as a function of Phi_2 mass, assuming that the leptoquarks are produced in pairs and decay into a muon and a quark with branching ratio beta. Using a Next-to-Leading order QCD calculation, we extract a lower mass limit of M_{\Phi_2} > 202 (160) GeV$/c^{2} at 95% confidence level for scalar leptoquarks with beta=1(0.5).

Full Text