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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
19
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pubmed:dateCreated |
2011-6-14
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pubmed:abstractText |
We present a search for a new particle T' decaying to top quark via T' ? t + X, where X is an invisible particle. In a data sample with 4.8??fb(-1) of integrated luminosity collected by the CDF II detector at Fermilab in pp collisions with ?s = 1.96??TeV, we search for pair production of T' in the lepton + jets channel, pp ? tt + X + X ? ??bqq'b + X + X. We interpret our results primarily in terms of a model where T' are exotic fourth generation quarks and X are dark matter particles. Current direct and indirect bounds on such exotic quarks restrict their masses to be between 300 and 600??GeV/c2, the dark matter particle mass being anywhere below m(T'). The data are consistent with standard model expectations, and we set 95% confidence level limits on the generic production of T'T' ? tt + X + X. For the dark matter model we exclude T' at 95% confidence level up to m(T') = 360??GeV/c2 for m(X) ? 100??GeV/c2.
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pubmed:language |
eng
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pubmed:journal |
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pubmed:status |
PubMed-not-MEDLINE
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pubmed:month |
May
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pubmed:issn |
1079-7114
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pubmed:author |
pubmed-author:TuYY,
pubmed-author:KatoYY,
pubmed-author:ThompsonG AGA,
pubmed-author:JonesMM,
pubmed-author:LisMM,
pubmed-author:PaulDD,
pubmed-author:SmithJ RJR,
pubmed-author:HaraKK,
pubmed-author:GibsonKK,
pubmed-author:NagaiYY,
pubmed-author:TangJJ,
pubmed-author:CastroAA,
pubmed-author:JohnsonWW,
pubmed-author:SatoKK,
pubmed-author:OhS HSH,
pubmed-author:ChenY CYC,
pubmed-author:TakeuchiYY,
pubmed-author:WilsonPP,
pubmed-author:YoshidaTT,
pubmed-author:SchmidtAA,
pubmed-author:NielsenJJ,
pubmed-author:MartínezMM,
pubmed-author:WeinbergerMM,
pubmed-author:ConwayJJ,
pubmed-author:CoxD JDJ,
pubmed-author:YamamotoKK,
pubmed-author:KurataMM,
pubmed-author:GrinsteinSS,
pubmed-author:LeeH SHS,
pubmed-author:GinsburgC MCM,
pubmed-author:FieldRR,
pubmed-author:RayAA,
pubmed-author:KondoKK,
pubmed-author:BauerGG,
pubmed-author:MukherjeeAA,
pubmed-author:LeeII,
pubmed-author:PatrickJJ,
pubmed-author:BenjaminDD,
pubmed-author:WilsonJ SJS,
pubmed-author:WagnerR LRL,
pubmed-author:LeeJ SJS,
pubmed-author:SchmittMM,
pubmed-author:SantiLL,
pubmed-author:SmithG GGG,
pubmed-author:MehtaAA,
pubmed-author:LancasterMM,
pubmed-author:VogelMM,
pubmed-author:JansHH,
pubmed-author:SchmidtE EEE,
pubmed-author:HareDD,
pubmed-author:ClarkAA,
pubmed-author:ChoKK,
pubmed-author:LewisJ DJD,
pubmed-author:RossiMM,
pubmed-author:DorigoMM,
pubmed-author:LeeS WSW,
pubmed-author:SakuraiYY,
pubmed-author:KimH WHW,
pubmed-author:EbinaKK,
pubmed-author:HaraII,
pubmed-author:LeaAA,
pubmed-author:SchwarzTT,
pubmed-author:MOER ERE,
pubmed-author:JamesEE,
pubmed-author:CampbellMM,
pubmed-author:HusseinMM,
pubmed-author:MiyakeHH,
pubmed-author:WrightTT,
pubmed-author:KimuraNN,
pubmed-author:YangY CYC,
pubmed-author:CampanelliMM,
pubmed-author:DengJJ,
pubmed-author:OhY HYH,
pubmed-author:WagnerPP,
pubmed-author:HornDD,
pubmed-author:RusuVV,
pubmed-author:FranklinMM,
pubmed-author:MitraAA,
pubmed-author:DonathRR,
pubmed-author:KimH SHS,
pubmed-author:PiacentiniII,
pubmed-author:FunakoshiYY,
pubmed-author:WolfeHH,
pubmed-author:MooreRR,
pubmed-author:ShiraishiSS
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