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. 2010 Dec 3;105(23):232003.
doi: 10.1103/PhysRevLett.105.232003. Epub 2010 Dec 3.

Direct top-quark width measurement at CDF

T Aaltonen  1 B Álvarez GonzálezS AmerioD AmideiA AnastassovA AnnoviJ AntosG ApollinariJ A AppelA ApresyanT ArisawaA ArtikovJ AsaadiW AshmanskasB AuerbachA AurisanoF AzfarW BadgettA Barbaro-GaltieriV E BarnesB A BarnettP BarriaP BartosM BauceG BauerF BedeschiD BeecherS BehariG BellettiniJ BellingerD BenjaminA BeretvasA BhattiM BinkleyD BiselloI BizjakK R BlandC BlockerB BlumenfeldA BocciA BodekD BortolettoJ BoudreauA BoveiaB BrauL BrigliadoriA BrisudaC BrombergE BruckenM BucciantonioJ BudagovH S BuddS BuddK BurkettG BusettoP BusseyA BuzatuS CabreraC CalanchaS CamardaM CampanelliM CampbellF CanelliA CanepaB CarlsD CarlsmithR CarosiS CarrilloS CarronB CasalM CasarsaA CastroP CatastiniD CauzV CavaliereM Cavalli-SforzaA CerriL CerritoY C ChenM ChertokG ChiarelliG ChlachidzeF ChlebanaK ChoD ChokheliJ P ChouW H ChungY S ChungC I CiobanuM A CiocciA ClarkD ClarkG CompostellaM E ConveryJ ConwayM CorboM CordelliC A CoxD J CoxF CrescioliC Cuenca AlmenarJ CuevasR CulbertsonD DagenhartN d'AscenzoM DattaP de BarbaroS De CeccoG De LorenzoM Dell'OrsoC DelucaL DemortierJ DengM DeninnoF DevotoM d'ErricoA Di CantoB Di RuzzaJ R DittmannM D'OnofrioS DonatiP DongT DorigoK EbinaA ElaginA EppigR ErbacherD ErredeS ErredeN ErshaidatR EusebiH C FangS FarringtonM FeindtJ P FernandezC FerrazzaR FieldG FlanaganR ForrestM J FrankM FranklinJ C FreemanI FuricM GallinaroJ GalyardtJ E GarciaA F GarfinkelP GarosiH GerberichE GerchteinS GiaguV GiakoumopoulouP GiannettiK GibsonC M GinsburgN GiokarisP GirominiM GiuntaG GiurgiuV GlagolevD GlenzinskiM GoldD GoldinN GoldschmidtA GolossanovG GomezG Gomez-CeballosM GoncharovO GonzálezI GorelovA T GoshawK GoulianosA GreseleS GrinsteinC Grosso-PilcherJ Guimaraes da CostaZ Gunay-UnalanC HaberS R HahnE HalkiadakisA HamaguchiJ Y HanF HappacherK HaraD HareM HareR F HarrK HatakeyamaC HaysM HeckJ HeinrichM HerndonS HewamanageD HidasA HockerW HopkinsD HornS HouR E HughesM HurwitzU HusemannN HussainM HusseinJ HustonG IntrozziM IoriA IvanovE JamesD JangB JayatilakaE J JeonM K JhaS JindarianiW JohnsonM JonesK K JooS Y JunT R JunkT KamonP E KarchinY KatoW KetchumJ KeungV KhotilovichB KilminsterD H KimH S KimH W KimJ E KimM J KimS B KimS H KimY K KimN KimuraS KlimenkoK KondoD J KongJ KonigsbergA KorytovA V KotwalM KrepsJ KrollD KropN KrumnackM KruseV KrutelyovT KuhrM KurataS KwangA T LaasanenS LamiS LammelM LancasterR L LanderK LannonA LathG LatinoI LazzizzeraT LeCompteE LeeH S LeeJ S LeeS W LeeS LeoS LeoneJ D LewisC-J LinJ LinacreM LindgrenE LipelesA ListerD O LitvintsevC LiuQ LiuT LiuS LockwitzN S LockyerA LoginovD LucchesiJ LueckP LujanP LukensG LunguJ LysR LysakR MadrakK MaeshimaK MakhoulP MaksimovicS MalikG MancaA Manousakis-KatsikakisF MargaroliC MarinoM MartínezR Martínez-BallarínP MastrandreaM MathisM E MattsonP MazzantiK S McFarlandP McIntyreR McNultyA MehtaP MehtalaA MenzioneC MesropianT MiaoD MietlickiA MitraH MiyakeS MoedN MoggiM N MondragonC S MoonR MooreM J MorelloJ MorlockP Movilla FernandezA MukherjeeTh MullerP MuratM MussiniJ NachtmanY NagaiJ NaganomaI NakanoA NapierJ NettC NeuM S NeubauerJ NielsenL NodulmanO NorniellaE NurseL OakesS H OhY D OhI OksuzianT OkusawaR OravaL OrtolanS Pagan GrisoC PagliaroneE PalenciaV PapadimitriouA A ParamonovJ PatrickG PaulettaM PauliniC PausD E PellettA PenzoT J PhillipsG PiacentinoE PianoriJ PilotK PittsC PlagerL PondromK PotamianosO PoukhovF ProkoshinA PronkoF PtohosE PueschelG PunziJ PursleyA RahamanV RamakrishnanN RanjanI RedondoP RentonM RescignoF RimondiL RistoriA RobsonT RodrigoT RodriguezE RogersS RolliR RoserM RossiF RuffiniA RuizJ RussV RusuA SafonovW K SakumotoL SantiL SartoriK SatoV SavelievA Savoy-NavarroP SchlabachA SchmidtE E SchmidtM P SchmidtM SchmittT SchwarzL ScodellaroA ScribanoF ScuriA SedovS SeidelY SeiyaA SemenovF SforzaA SfyrlaS Z ShalhoutT ShearsP F ShepardM ShimojimaS ShiraishiM ShochetI ShreyberA SimonenkoP SinervoA SissakianK SliwaJ R SmithF D SniderA SohaS SomalwarV SorinP SquillaciotiM StanitzkiR St DenisB StelzerO Stelzer-ChiltonD StentzJ StrologasG L StryckerY SudoA SukhanovI SuslovK TakemasaY TakeuchiJ TangM TecchioP K TengJ ThomJ ThomeG A ThompsonE ThomsonP Ttito-GuzmánS TkaczykD TobackS TokarK TollefsonT TomuraD TonelliS TorreD TorrettaP TotaroM TrovatoY TuN TuriniF UkegawaS UozumiA VarganovE VatagaF VázquezG VelevC VellidisM VidalI VilaR VilarM VogelG VolpiP WagnerR L WagnerT WakisakaR WallnyS M WangA WarburtonD WatersM WeinbergerW C Wester 3rdB WhitehouseD WhitesonA B WicklundE WicklundS WilburF WickH H WilliamsJ S WilsonP WilsonB L WinerP WittichS WolbersH WolfeT WrightX WuZ WuK YamamotoJ YamaokaT YangU K YangY C YangW-M YaoG P YehK YiJ YohK YoritaT YoshidaG B YuI YuS S YuJ C YunA ZanettiY ZengS ZucchelliCDF Collaboration
Affiliations

Direct top-quark width measurement at CDF

T Aaltonen et al. Phys Rev Lett. .

Abstract

We present a measurement of the top-quark width in the lepton+jets decay channel of tt events produced in p p collisions at Fermilab's Tevatron collider and collected by the CDF II detector. From a data sample corresponding to 4.3 fb(-1) of integrated luminosity, we identify 756 candidate events. The top-quark mass and the mass of the hadronically decaying W boson that comes from the top-quark decay are reconstructed for each event and compared with templates of different top-quark widths (Γ(t)) and deviations from nominal jet energy scale (Δ(JES)) to perform a simultaneous fit for both parameters, where Δ(JES) is used for the in situ calibration of the jet energy scale. By applying a Feldman-Cousins approach, we establish an upper limit at 95% confidence level (CL) of Γ(t) <7.6 GeV and a two-sided 68% CL interval of 0.3 GeV <Γ(t) <4.4 GeV for a top-quark mass of 172.5 GeV/c(2), which are consistent with the standard model prediction.

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