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. 2011 Apr 15;106(15):152001.
doi: 10.1103/PhysRevLett.106.152001. Epub 2011 Apr 14.

Measurement of the mass difference between t and t quarks

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 BlandB BlumenfeldA BocciA BodekD BortolettoJ BoudreauA BoveiaB BrauL BrigliadoriA BrisudaC BrombergE BruckenM BucciantonioJ BudagovH S BuddS BuddK BurkettG BusettoP BusseyA BuzatuC 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 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 DongM DorigoT DorigoK EbinaA ElaginA EppigR ErbacherD ErredeS ErredeN ErshaidatR EusebiH C FangS FarringtonM FeindtJ P FernandezC FerrazzaR FieldG FlanaganR ForrestM J FrankM FranklinJ C FreemanY FunakoshiI 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-PilcherR C GroupJ 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 KimuraM KirbyS KlimenkoK KondoD J KongJ KonigsbergA 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 RubboF RuffiniA RuizJ RussV RusuA SafonovW K SakumotoY SakuraiL 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 StancariM 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 TuF UkegawaS UozumiA VarganovF VázquezG VelevC VellidisM VidalI VilaR VilarJ VizánM 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
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Free article

Measurement of the mass difference between t and t quarks

T Aaltonen et al. Phys Rev Lett. .
Free article

Abstract

We present a direct measurement of the mass difference between t and t quarks using tt candidate events in the lepton+jets channel, collected with the CDF II detector at Fermilab's 1.96 TeV Tevatron pp Collider. We make an event by event estimate of the mass difference to construct templates for top quark pair signal events and background events. The resulting mass difference distribution of data is compared to templates of signals and background using a maximum likelihood fit. From a sample corresponding to an integrated luminosity of 5.6 fb(-1), we measure a mass difference, ΔM(top) = M(t) - M(t) = -3.3 ± 1.4(stat) ± 1.0(syst) GeV/c2, approximately 2 standard deviations away from the CPT hypothesis of zero mass difference.

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