6533b874fe1ef96bd12d6111

RESEARCH PRODUCT

Evidence for production of single top quarks and first direct measurement of |Vtb|.

L. S. VertogradovR. K. ShivpuriS. J. ParkD. R. ClaesGavin DaviesPhilippe CalfayanFabrice CoudercY. A. YatsunenkoN. KhalatyanA. BadenG. C. BlazeyY. ArnoudR. BernhardW. E. CooperD. ShpakovChristophe RoyonS. M. LiettiY. ScheglovKaushik DeViatcheslav StolinK. W. MerrittP. HaefnerT. GadfortR. HooperJ. MolinaJ. F. BartlettR. YamadaH. D. WahlLiang LiYann CoadouP. BanerjeeC. BiscaratP. VintI. BlacklerV. OguriA. KoubarovskyA. V. PopovF. BadaudRobert KehoeGustaaf BrooijmansMikko VoutilainenMikko VoutilainenJean-francois GrivazS. H. AhnP. De JongCarlos AvilaS. SumowidagdoJ. WarcholH. WeertsSabine Crépé-renaudinJan StarkTiefu ZhaoM. BinderArnaud DuperrinHenry LubattiE. GalyaevM. YanS. BurkeP. SvoiskyP. VerdierM. ArovP. JonssonLev DudkoN. GollubN. GollubN. GollubSuyong ChoiJ. CamminT. YasudaV. M. KorablevJong-sung YuS. J. De JongF. Villeneuve-seguierRobert HiroskyB. KothariA. A. ShchukinMaria Elena PolD. A. StoyanovaP. L.m. Podesta-lermaHwi Dong YooS. SenguptaZdenek HubacekFrank FiedlerSascha CaronE. KajfaszJ. R. KalkB. TillerS. W. YounE. Von ToerneP. HanssonP. HanssonP. HanssonElizabeth GallasS. DesaiA. M. KalininJ. KasperChris P. BarnesThomas HebbekerD. KhatidzeM. MuldersMary Beth AdamsZ. LiuAaron DominguezSergey BurdinM. EadsP. NeustroevR. JesikK. A. JohnsD. BauerM. DasS. P. DenisovAndrew WhiteV. A. BezzubovJ. P. NegretG. GutierrezNikola MakovecC. JarvisK. J. RaniA. AltonA. AltonM. SosebeeAlexander LeflatJonas StrandbergM. StrovinkJ. KotcherS. AndersonR. P. SmithSophie Trincaz-duvoidN. ParuaM. MichautBrad AbbottC. AyGregorio BernardiD. DenisovF. LehnerPierre PetroffJ. M. HeinmillerHarald FoxT. KuhlKarl JakobsM. VetterliM. VetterliHal EvansThomas FerbelM. JaffréM. LynkerA. C. Le BihanL. DuflotArmen VartapetianMichael HildrethG. SajotY. HuNikos VarelasA. V. FerapontovFrederic DeliotX. F. SongBing ZhouLuis MendozaG. ObrantG. SavageS. LammersFreya BlekmanD. KauShabnam JabeenLars SonnenscheinB. Van EijkW. M. LeeM. VaupelGilvan AlvesDorothee SchaileM. S. RangelD. EdmundsA. EvdokimovMichael MulhearnM. P. SandersAndrei NomerotskiMichael BegelAlexander KupcoJ. M. HauptmanJ. MitrevskiEduardo De Moraes GregoresG. GrenierL. BagbyM. MerkinJeroen HegemanS. UzunyanA. C.s. Assis JesusH. HoethGuennadi BorissovC. NoedingI. A. VasilyevP. M. PereaCecilia Elena GerberM. HohlfeldWendy TaylorN. A. NaumannM. S. AnzelcSarah Catherine EnoHorst SeveriniDmitri TsybychevR. L. MccarthyStephen WimpennyRoger MooreJohn HobbsW. C. FisherMartin GrunewaldP. LewisJ. SnowHarrison ProsperRaymond BrockK. M. ChanChristian ZeitnitzJ. BarretoBoaz KlimaK. PetersChristophe ClementChristophe ClementChristophe ClementNeeti ParasharM. PetteniS. ReucroftBoris TuchmingRandy RuchtiJunjie ZhuMilos LokajicekY. XieAmnon HarelAndre SznajderYuri GershteinAndrew BrandtSergio F NovaesRichard B. LiptonSung Keun ParkLuiz MundimB. ÅSmanB. ÅSmanB. ÅSmanD. KäferI. KatsanosF. GuoKirti RanjanG. GintherM. ZielinskiR. BeuselinckVipin BhatnagarE. De La Cruz-bureloV. M. AbazovDarien WoodV. BuescherH.e. MiettinenCarsten HenselKristian HarderJ. M. KalkA. BellavanceA. MagerkurthA. ZatserklyaniyLimin WangB. DaviesMarc-andre PleierA. YurkewiczJ. HaysD. CuttsNicholas John HadleyC. P. BuszelloYurii MaravinV. V. SharyS. J. HongR. PartridgeS. BlessingPaul TelfordJun GuoQ. Z. LiO. MundalVladimir GavrilovScott SnyderWagner CarvalhoS. KapplerP. K. MalGreg LandsbergSw. BanerjeePedro G MercadanteJianming QianJulia S. MeyerA. P. HeinsonT. H. BurnettGordon WattsV. SirotenkoReinhard SchwienhorstMichael A. StraussChristian AutermannAvto KharchilavaKenneth BloomIain Alexander BertramV. L. MalyshevC. Belanger-champagneC. Belanger-champagneC. Belanger-champagneMarco VerzocchiS. Söldner-remboldC. MagassDugan O'neilE. G. ZverevAlexander KhanovPedrame BargassaMichael RijssenbeekG. S. MuanzaM. H. KirbyO. AtramentovD. KropM. FordMd. NaimuddinL. ChristofekA. PatwaW. GeistMark OwenRobert HarringtonPhillip GutierrezP. LebrunK. SoustruznikM. KopalJ. A. BenitezN. J. BuchananH. S. MaoSharon HagopianDenis GeléA. JenkinsN. M. CasonV. M. PodstavkovA. MendesA. K.a. MacielJ. A. ParsonsJ. OstaM. DoidgeR. Van KootenRaimund StröhmerV. SimakM. FortnerH. KimM. D. CorcoranM. CookeW. L. Prado Da SilvaGraham WilsonS. StrandbergS. StrandbergS. StrandbergPh GrisL. BerntzonMarcia BegalliV. N. EvdokimovI. Ripp-baudotP. PadleyG. AlkhazovR. F. RodriguesR. E. HallD. V. BandurinUlrich HeintzMitchell WayneD. K. ChoA. StoneI. HallT. ScanlonP. HoubenS. KermicheM. PangilinanW. M. Van LeeuwenI. TorchianiK. HernerD. OnoprienkoT. TooleH. Da MottaD. GillbergA. KryemadhiNorbert WermesJ. HaleyH. SchellmanJ. M. KohliFrank FilthautSuman Bala BeriM. DiesburgStefan GrünendahlD. BrownEmanuela BarberisKazunori HanagakiDongliang ZhangP. SkubicVivian O'dellShuichi KunoriM. NarainM. NarainE. E. BoosAshok KumarA. S. ItoA. MelnitchoukS. ChakrabartiChristian SchmittPeter LoveM. H.g. SouzaL. HanAriel SchwartzmanS. UvarovR. PiegaiaJ. D. DegenhardtYvonne PetersR. OtecMossadek TalbyA. JusteTodd AdamsTae Jeong KimTulika BoseB. GómezH. E. FiskJ. SekaricShashikant DugadR. J. MadarasHeriberto Castilla-valdezJ. LazofloresV. HynekC. T. PotterP. RenkelS. YacoobM. C. CousinouEmmanuel BusatoT. MilletA. ZieminskiM. ĆWiokMarvin JohnsonF. ChevallierV. V. LipaevV. LesneB. QuinnA. V. KozelovGeorge AlversonC. De Oliveira MartinsP. N. RatoffP. M. TutsAdam L. LyonD. HedinD. BolineMakoto TomotoV. V. TokmeninR. GelhausChristopher George TullyAran Garcia-bellidoC. SchwanenbergerAlice BeanM. A. StrangS. FuV. BunichevBobby Samir AcharyaH. A. NealY. M. KharzheevMaksym TitovG. HeskethJ. T. LinnemannPatrick SlatteryR. A. SidwellK. YipH. GreenleeD. M. StromN. OliveiraP. J. Van Den BergJessica LevêqueK. BosMarc BesanconJ. TempleB. C.k. CaseyM. AnastasoaieG. J. Otero Y GarzónR. UnalanA. BrossL. StutteGregory J PawloskiArnulf QuadtA.s. DyshkantJiri KvitaElemer NagyU. BasslerSerban ProtopopescuRupinder KaurBradley CoxS. RobinsonRegina DeminaAndy HaasY. EnariT. MoulikD. WickeMaxim PerfilovAlberto SantoroJ. G.r. LimaL. LoboG. WeberD. ChakrabortyLorenzo FeligioniP. RubinovJ. WomersleyDon LincolnErich VarnesP.f. ErmolovM. WobischA. PompošD. KarmanovR. K. MommsenJ. MonkSudhir MalikIa IashviliJean-roch VlimantBrajesh C ChoudharyJing LiM. H.l.s. WangB. G. PopeL. BellantoniHelena MalbouissonThomas TrefzgerCalvin A. JohnsonS. CalvetB. ClémentM. WetsteinElizaveta ShabalinaJ. P. KonrathJ. N. ButlerTimothy AndeenG. D. AlexeevFlera RizatdinovaH. DongP. D. GrannisD. BuchholzJ. SteeleAlexander GrohsjeanA. JonckheereA. LobodenkoN. OshimaDaniel BlochDaria ZieminskaP. TamburelloA. ChandraR. D. SchambergerT. R. WyattAnna GoussiouPushpalatha C BhatLev UvarovF. CharlesM. BuehlerT. NunnemannReiner HauserM. AbolinsB. BaldinB. HoeneisenLee SawyerL. S. AncuS.a. KahnJ. DyerGregory R SnowP. H. KasperD. LamMansoora ShamimS. BealeM. DemarteauCarmen GarcíaE. AguiloN. K. MondalP. SchieferdeckerAndre SopczakH. T. DiehlT. A. BoltonY. PogorelovP. MättigB. AndrieuR. IllingworthElliott CheuA. BoehnleinVictor Daniel ElviraChuanhua YuJ. EllisonM. AhsanSa. JainS. FuessChristophe OchandoA. Sanchez-hernandezT. KurcaMarc WeberV. ZutshiPhilip BaringerV. SiccardiA. LounisA. MeyerJ. PiperAndrew AskewBrigitte VachonAshok DasMarcel VreeswijkB. SpurlockZeno Dixon GreenwoodCristina GaleaD. Duggan

subject

QuarkParticle physicsPhysics::Instrumentation and DetectorsTevatronFOS: Physical sciencesGeneral Physics and Astronomy01 natural sciences14.65.Ha 12.15.Hh 13.85.NiParticle identificationHigh Energy Physics - Experimentlaw.inventionStandard ModelNuclear physicsHigh Energy Physics - Experiment (hep-ex)law0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Fermilab010306 general physicsColliderPhysics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentProduction (computer science)

description

The D0 Collaboration presents first evidence for the production of single top quarks at the Fermilab Tevatron ppbar collider. Using a 0.9 fb^-1 dataset, we apply a multivariate analysis to separate signal from background and measure sigma(ppbar->tb+X,tqb+X) = 4.9 +- 1.4 pb. The probability to measure a cross section at this value or higher in the absence of signal is 0.035%, corresponding to a 3.4 standard deviation significance. We use the cross section measurement to directly determine the CKM matrix element that describes the Wtb coupling and find 0.68 < |Vtb| <= 1 at 95% C.L. within the standard model.

10.1103/physrevlett.98.181802https://pubmed.ncbi.nlm.nih.gov/17501561