Kinematics of t(t)over-bar events at CDF F Abe , H Akimoto , A Akopian , M G Albrow , A Amadon , Amendolia , D Amidei , J Antos , S Aota , G Apollinari , T Arisawa , T Asakawa , W Ashmanskas , M Atac , P Azzibacchetta , N Bacchetta , S Bagdasarov , M W Bailey , P De Barbaro , A Barbarogaltieri , V E Barnes , B A Barnett , M Barone , G Bauer , T Baumann , F Bedeschi , S Behrends , S Belforte , G Bellettini , J Bellinger , D Benjamin , J R Bensinger , A Beretvas , J P Berge , J Berryhill , S Bertolucci , S Bettelli , B Bevensee , A Bhatti , K Biery , C Bigongiari , M Binkley , D Bisello , R E Blair , C Blocker , K Bloom , S Blusk , A Bodek , W Bikhari , G Bolla , Y Bonushkin , D Bortoletto , J Boudreau , L Breccia , C Bromberg , N Bruner , R Brunetti , E Buckleygeer , H S Budd , K Burkett , G Busetto , A Byonwagner , K L Byrum , M Campbell , A Caner , W Carithers , D Carlsmith , J Cassada , A Castro , D Cauz , A Cerri , P T Chang , H Y Chao , J W Chapman , M T Cheng , M Chertok , G Chiarelli , C N Chiou , F Chlebana , L Christofek , R Cropp , M L Chu , S Cihangir , A Clark , M Cobal , E Cocca , Mauricio Contreras , J Conway , J Cooper , M Cordelli , Davide Costanzo , C Couyoumtzelis , D Croninhennessy , R Culbertson , D Dagenhart , T Daniels , F Dejongh , S Dellagnello , M Dellorso , R Demina , L Demortier , M Deninno , P F Derwent , T Devlin , Dittmann , S Donati , J Done , T Dorigo , N Eddy , K Einsweiler , J E Elias , R Ely , E Engels , W Erdmann , D Errede , S Errede , Q Fan , R G Feild , Z Feng , C Ferretti , I Fiori , B Flaugher , G W Foster , M Franklin , J Freeman , Jonathan A Friedman , H Frisch , Yasuhisa Fukui , S Gadomski , S Galeotti , M Gallinaro , O Ganel , M Garciasciveres , A F Garfinkel , C Gay , S Geer , D W Gerdes , P Giannetti , N Giokaris , P Giromini , G Giusti , M Gold , A Gordon , A T Goshaw , Yury Gotra , K Goulianos , H Grassmann , C Green , L Groer , C Grossopilcher , G Guillian , J G Da Costa , R S Guo , C Haber , E Hafen , Hahn , Robert M Hamilton , T Handa , R Handler , W Hao , F Happacher , Kunio Hara , A D Hardman , R M Harris , F Hartmann , J Hausser , E Hayashi , J Heinrich , A Heiss , B Hinrichsen , K D Hoffman , C Holck , R Hollebeek , L Holloway , Zufei Huang , B T Huffman , R E Hughes , J Huston , J Huth , Hiroaki Ikeda , M Incagli , J Incandela , G Introzzi , J Iwai , Y Iwata , E James , H Jensen , U Joshi , E Kajfasz , Hirofumi Kambara , T Kamon , Takeshi Kaneko , K Karr , H Kasha , Yasuhiro Kato , T A Keaffaber , K Kelley , R D Kennedy , R Kephart , D Kestenbaum , D Khazins , Toshiaki Kikuchi , B J Kim , H S Kim , S H Kim , Yong Ki Kim , L Kirsch , S Klimenko , D Knoblauch , P Koehn , A Kongeter , K Kondo , J Konigsberg , K Kordas , A Korytov , Elizabeth J Kovacs , W Kowald , J Kroll , M Kruse , S E Kuhlmann , E Kuns , K Kurino , T Kuwabara , A T Laasanen , S Lami , S Lammel , J I Lamoureux , M Lancaster , M Lanzoni , G Latino , T Lecompte , S Leone , J D Lewis , M Lindgren , T M Liss , J B Liu , Y C Liu , N S Lockyer , O Long , M Loreti , D Lucchesi , P Lukens , S Lusin , J Lys , K Maeshima , P Maksimovic , M Mangano , M Mariotti , J P Marriner , G Martignon , A Martin , Jaj Matthews , P Mazzanti , K S Mcfarland , P Mcintyre , P Melese , M Menguzzato , A Menzione , E Meschi , S Metzler , C Miao , T Miao , G Michail , Richard A Miller , H Minato , S Miscetti , M Mishina , S Miyashita , N Moggi , E Moore , Yoshifumi Morita , A Mukherjee , Th Muller , A Munar , P Murat , S Murgia , M Musy , H Nakada , T Nakaya , I Nakano , Colleen C Nelson , D Neuberger , C Newmanholmes , Cyp Ngan , L Nodulman , A Nomerotski , S H Oh , T Ohmoto , T Ohsugi , R Oishi , M Okabe , T Okusawa , Jorunn E Olsen , C Pagliarone , R Paoletti , Papadimitriou , S P Pappas , N Parashar , A Parri , J Patrick , G Pauletta , M Paulini , A Perazzo , L Pescara , M Peters , T J Phillips , G Piacentino , M R A Pillai , K Pitts , R Plunkett , A Pompos , L Pondrom , J Proudfoot , F Ptohos , G Punzi , K Ragan , D Reher , M Reischl , A Ribon , F Rimondi , L Ristori , W J Robertson , Allen L Robinson , T Rodrigo , S Rolli , L Rosenson , R Roser , T Saab , W K Sakumoto , D Saltzberg , A Sansoni , L Santi , Hirokazu Sato , P Schlabach , E E Schmidt , M P Schmidt , A L Scott , A Scribano , S Segler , S Seidel , Y Seiya , F Semeria , T P Shah , M D Shapiro , N M Shaw , P F Shepard , T Shibayama , M Shimojima , M Shochet , J Siegrist , A Sill , P Sinervo , Prakash Singh , K Sliwa , Camilla M Smith , F D Snider , J Spalding , T Speer , P Sphicas , F Spinella , M Spiropulu , L Spiegel , L Stanco , J Steele , A M Stefanini , R Strohmer , J Strologas , F Strumia , D Stuart , K Sumorok , Junichi Suzuki , Toyoaki Suzuki , Toshiyuki Takahashi , T Takano , R Takashima , K Takikawa , Mitsuru Tanaka , B Tannenbaum , F Tartarelli , W Taylor , M Tecchio , P K Teng , Y Teramoto , K Terashi , S Tether , D Theriot , T L Thomas , R Thurmankeup , Michael P Timko , P Tipton , A A Titov , S Tkaczyk , D Toback , K Tollefson , A Tollestrup , H Toyoda , W Trischuk , J F De Troconiz , S Truitt , Jeffrey Tseng , N Turini , Toshihiko Uchida , F Ukegawa , J Valls , S C Van Den Brink , S Vejcik , G Velev , I Volobouev , R Vidal , R Vilar , D Vucinic , R G Wagner , J Wahl , N B Wallace , A M Walsh , C H Wang , M J Wang , A Warburton , Tomoko Watanabe , T Watts , Robert S Webb , Chialing Wei , H Wenzel , W C Wester , A B Wicklund , E Wicklund , R Wilkinson , H H Williams , P Wilson , B L Winer , D Winn , D Wolinski , J Wolinski , Steven Worm , X Wu , J Wyss , A Yagil , Weiming Yao , Kiyoshi Yasuoka , G P Yeh , P Yeh , J Yoh , C Yosef , Takahumi Yoshida , I Yu , A Zanetti , F Zetti , S Zucchelli PHYSICAL REVIEW D（1999）
摘要
The kinematic properties of t(t)over-bar events are studied in the W+ multijet channel using data collected with the CDF detector during the 1992-1995 runs at the Fermilab Tevatron collider corresponding to an integrated luminosity of 109 pb(-1). Distributions of a variety of kinematic variables chosen to be sensitive to different aspects of t (t) over bar production an compared with those expected from Monte Carlo calculations. A sample of 34 events rich in t(t)over-bar pairs is obtained by requiring at least one jet identified by the silicon vertex detector (SVX) as having a displaced vertex consistent with the decay of a b hadron. The data are found to be in good agreement with predictions of the leading order t(t)over-bar matrix element with color coherent parton shower evolution. [S0556-2821(99)04007-2].
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