Search For Scalar Bottom Quarks From Gluino Decays In (P)Over-Barp Collisions At Root S=1.96 Tev
A Abulencia,D Acosta,J Adelman,T Affolder,T Akimoto,Mg Albrow,D Ambrose,S Amerio,D Amidei,A Anastassov,K Anikeev,A Annovi,J Antos,M Aoki,G Apollinari,Jf Arguin,T Arisawa,A Artikov,W Ashmanskas,A Attal,F Azfar,P Azzi-Bacchetta,P Azzurri,N Bacchetta,H Bachacou,W Badgett,A Barbaro-Galtieri,Ve Barnes,Ba Barnett,S Baroiant,V Bartsch,G Bauer,F Bedeschi,S Behari,S Belforte,G Bellettini,J Bellinger,A Belloni,E Ben-Haim,D Benjamin,A Beretvas,J Beringer,T Berry,A Bhatti,M Binkley,D Bisello,M Bishai,Re Blair,C Blocker,K Bloom,B Blumenfeld,A Bocci,A Bodek,V Boisvert,G Bolla,A Bolshov,D Bortoletto,J Boudreau,S Bourov,A Boveia,B Brau,C Bromberg,E Brubaker,J Budagov,Hs Budd,S Budd,K Burkett,G Busetto,P Bussey,Kl Byrum,S Cabrera,M Campanelli,M Campbell,F Canelli,A Canepa, D Carlsmith,R Carosi,S Carron,M Casarsa,A Castro,P Catastini,D Cauz,M Cavalli-Sforza,A Cerri,L Cerrito,Sh Chang,J Chapman,Yc Chen,M Chertok,G Chiarelli,G Chlachidze,F Chlebana,I Cho,K Cho,D Chokheli,Jp Chou,Ph Chu,Sh Chuang,K Chung,Wh Chung,Ys Chung,M Ciljak,Ci Ciobanu,Ma Ciocci,A Clark,D Clark,M Coca,A Connolly,Me Convery,J Conway,B Cooper,K Copic,M Cordelli,G Cortiana,A Cruz,J Cuevas,R Culbertson,D Cyr,S Daronco,S D'Auria,M D'Onofrio,D Dagenhart,P De Barbaro,S De Cecco,A Deisher,G De Lentdecker,M Dell'Orso,S Demers,L Demortier,J Deng,M Deninno,D De Pedis,Pf Derwent,C Dionisi,Jr Dittmann,P Dituro,C Dorr,A Dominguez,S Donati,M Donega,P Dong,J Donini,T Dorigo,S Dube,K Ebina,J Efron,J Ehlers,R Erbacher, D Errede,S Errede,R Eusebi,Hc Fang,S Farrington,I Fedorko,Wt Fedorko,Rg Feild,M Feindt,Jp Fernandez,R Field,G Flanagan,Lr Flores-Castillo,A Foland,S Forrester,Gw Foster,M Franklin,Jc Freeman,Y Fujii,I Furic,A Gajjar,M Gallinaro,J Galyardt,Je Garcia,M Garcia Sciverez,Af Garfinkel,C Gay,H Gerberich,E Gerchtein,D Gerdes,S Giagu,Gp Di Giovanni,P Giannetti,A Gibson,K Gibson,C Ginsburg,N Giokaris,K Giolo,M Giordani,M Giunta, G Giurgiu,V Glagolev,D Glenzinski,M Gold,N Goldschmidt,J Goldstein,G Gomez,G Gomez-Ceballos,M Goncharov,O Gonzalez,I Gorelov,At Goshaw,Y Gotra,K Goulianos, A Gresele,M Griffiths,S Grinstein,C Grosso-Pilcher,U Grundler,Jg Da Costa,C Haber,Sr Hahn,K Hahn,E Halkiadakis,A Hamilton,By Han,R Handler,F Happacher,K Hara,M Hare,S Harper,Rf Harr,Rm Harris,K Hatakeyama,J Hauser,C Hays,H Hayward,A Heijboer,B Heinemann,J Heinrich,M Hennecke,M Herndon,J Heuser,D Hidas,Cs Hill,D Hirschbuehl,A Hocker,A Holloway,S Hou,M Houlden,Sc Hsu,Bt Huffman,Re Hughes,J Huston,K Ikado,J Incandela,G Introzzi,M Iori,Y Ishizawa,A Ivanov,B Iyutin,E James,D Jang,B Jayatilaka,D Jeans,H Jensen,Ej Jeon,M Jones,Kk Joo,Sy Jun,Tr Junk,T Kamon,J Kang,M Karagoz-Unel,Pe Karchin,Y Kato,Y Kemp,R Kephart,U Kerzel,V Khotilovich,B Kilminster,Dh Kim,Hs Kim, Je Kim,Mj Kim,Ms Kim,Sb Kim,Sh Kim,Yk Kim,M Kirby,L Kirsch,S Klimenko,M Klute,B Knuteson,Br Ko,H Kobayashi,K Kondo,Dj Kong,J Konigsberg,K Kordas,A Korytov,Av Kotwal,A Kovalev,J Kraus,I Kravchenko,M Kreps,A Kreymer,J Kroll,N Krumnack,M Kruse,V Krutelyov,Se 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Neu,Ms Neubauer,J Nielsen,T Nigmanov,L Nodulman,O Norniella,T Ogawa,Sh Oh,Yd Oh,T Okusawa,R Oldeman,R Orava,K Osterberg,C Pagliarone,E Palencia,R Paoletti,V Papadimitriou,A Papikonomou,Aa Paramonov,B Parks,S Pashapour,J Patrick,G Pauletta,M Paulini,C Paus,De Pellett,A Penzo,Tj Phillips,G Piacentino,J Piedra,K Pitts,C Plager,L Pondrom,G Pope,X Portell,O Poukhov,N Pounder,F Prakoshyn,A Pronko,J Proudfoot,F Ptohos,G Punzi,J Pursley,J Rademacker,A Rahaman,A Rakitin,S Rappoccio,F Ratnikov,B Reisert,V Rekovic,N Van Remortel,P Renton,M Rescigno,S Richter,F Rimondi,K Rinnert,L Ristori,Wj Robertson,A Robson,T Rodrigo,E Rogers,S Rolli,R Roser,M Rossi,R Rossin,C Rott,A Ruiz,J Russ,V Rusu,D Ryan,H Saarikko,S Sabik,A Safonov,Wk Sakumoto,G Salamanna,O Salto,D Saltzberg,C Sanchez,L Santi, S Sarkar,K Sato,P Savard,A Savoy-Navarro,T Scheidle,P Schlabach,Ee Schmidt,Mp Schmidt,M Schmitt,T Schwarz,L Scodellaro,Al Scott,A Scribano,F Scuri,A Sedov,S Seidel,Y Seiya,A Semenov,F Semeria,L Sexton-Kennedy,I 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PHYSICAL REVIEW LETTERS（2006）
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摘要
We searched for scalar bottom quarks in 156 pb(-1) of (P) over barp collisions at root s =1.96 TeV recorded by the Collider Detector at Fermilab II experiment at the Tevatron. Scalar bottom quarks can be produced from gluino decays in R-parity conserving models of supersymmetry when the mass of the gluino exceeds that of the scalar bottom quark. Then, a scalar bottom quark can decay into a bottom quark and a neutralino. To search for this scenario, we investigated events with large missing transverse energy and at least three jets, two or more of which were identified as containing a secondary vertex from the hadronization of b quarks. We found four candidate events, where 2.6 +/- 0.7 are expected from standard model processes, and placed 95% confidence level lower limits on gluino and scalar bottom quark masses of up to 280 and 240 GeV/c(2), respectively.
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