6533b82dfe1ef96bd1291e75
RESEARCH PRODUCT
A precise measurement of ΓZ→bb/ΓZ→hadrons
D. BuskulicI. De BonisD. DecampP. GhezC. GoyJ. -P. LeesM. -N. MinardB. PietrzykF. AriztizabalP. ComasJ. M. CrespoM. DelfinoI. EfthymiopoulosE. FernandezM. Fernandez-bosmanV. GaitanLl. GarridoT. MattisonA. PachecoC. PadillaA. PascualD. CreanzaM. De PalmaA. FarillaG. IaselliG. MaggiS. NataliS. NuzzoM. QuattrominiA. RanieriG. RasoF. RomanoF. RuggieriG. SelvaggiL. SilvestrisP. TempestaG. ZitoY. ChaiH. HuD. HuangX. HuangJ. LinT. WangY. XieD. XuR. XuJ. ZhangL. ZhangW. ZhaoE. BlucherG. BonviciniJ. BoudreauD. CasperH. DrevermannR. W. FortyG. GanisC. GayR. HagelbergJ. HarveyJ. HilgartR. JacobsenB. JostJ. KnoblochI. LehrausT. LohseM. MaggiC. MarkouM. MartinezP. MatoH. MeinhardA. MintenA. MiottoR. MiquelH. -G. MoserP. PalazziJ. R. PaterJ. A. PerlasJ. -F. PusztaszeriF. RanjardG. RedlingerL. RolandiJ. RothbergT. RuanM. SaichD. SchlatterM. SchmellingF. SefkowW. TejessyI. R. TomalinR. VeenhofH. WachsmuthS. WasserbaechW. WiedenmannT. WildishW. WitzelingJ. WotschackZ. AjaltouniF. BadaudM. Bardadin-otwinowskaR. El FellousA. FalvardP. GayC. GuicheneyP. HenrardJ. JoussetB. MichelJ. -C. MontretD. PallinP. PerretF. PodlyskiJ. ProriolF. PrulhièreF. SaadiT. FearnleyJ. B. HansenJ. D. HansenJ. R. HansenP. H. HansenR. MøllerudB. S. NilssonA. KyriakisE. SimopoulouI. SiotisA. VayakiK. ZachariadouJ. BadierA. BlondelG. BonneaudJ. C. BrientG. FouqueS. OrteuA. RougéM. RumpfR. TanakaM. VerderiH. VideauD. J. CandlinM. I. ParsonsE. VeitchE. FocardiL. MonetaG. ParriniM. CordenC. GeorgiopoulosM. IkedaD. LevinthalA. AntonelliR. BaldiniG. BencivenniG. BolognaF. BossiP. CampanaG. CaponF. CeruttiV. ChiarellaB. D'ettorre-piazzoliG. FeliciP. LaurelliG. MannocchiF. MurtasG. P. MurtasL. PassalacquaM. Pepe-altarelliP. PicchiP. ColrainI. Ten HaveJ. G. LynchW. MaitlandW. T. MortonC. RaineP. ReevesJ. M. ScarrK. SmithM. G. SmithA. S. ThompsonR. M. TurnbullB. BrandlO. BraunC. GewenigerP. HankeV. HeppE. E. KlugeY. MaumaryA. PutzerB. RenschA. StahlK. TittelM. WunschR. BeuselinckD. M. BinnieW. CameronM. CattaneoD. J. CollingP. J. DornanA. M. GreeneJ. F. HassardN. M. LieskeA. MoutoussiJ. NashS. PattonD. G. PayneM. J. PhillipsG. San MartinJ. K. SedgbeerA. G. WrightP. GirtlerD. KuhnG. RudolphR. VoglC. K. BowderyT. J. BrodbeckA. J. FinchF. FosterG. HughesD. JacksonN. R. KeemerM. NuttallA. PatelT. SloanS. W. SnowE. P. WhelanK. KleinknechtJ. RaabB. RenkH. -G. SanderH. SchmidtF. SteegS. M. WaltherR. WankeB. WolfA. M. BencheikhC. BenchoukA. BonissentJ. CarrP. CoyleJ. DrinkardF. EtienneD. NicodS. PapalexiouP. PayreL. RoosD. RousseauP. SchwemlingM. TalbyS. AdlungR. AssmannC. BauerW. BlumD. BrownP. CattaneoB. DehningH. DietlF. DydakM. FrankA. W. HalleyK. JakobsJ. LauberG. LütjensG. LutzW. MännerR. RichterJ. SchröderA. S. SchwarzR. SettlesH. SeywerdU. StierlinU. StieglerR. St. DenisG. WolfR. AlemanyJ. BoucrotO. CallotA. CordierM. DavierL. DuflotJ. -F. GrivazPh. HeusseD. E. JaffeP. JanotD. W. KimF. Le DiberderJ. LefrançoisA. -M. LutzM. -H. SchuneJ. -J. VeilletI. VideauZ. ZhangD. AbbaneoG. BagliesiG. BatignaniU. BottigliC. BozziG. CalderiniM. CarpinelliM. A. CiocciR. Dell'orsoI. FerranteF. FidecaroL. FoàF. FortiA. GiassiM. A. GiorgiA. GregorioF. LigabueA. LusianiE. B. MannelliP. S. MarrocchesiA. MessineoF. PallaG. RizzoG. SanguinettiP. SpagnoloJ. SteinbergerR. TenchiniG. TonelliG. TriggianiC. VanniniA. VenturiP. G. VerdiniJ. WalshA. P. BetteridgeY. GaoM. G. GreenP. V. MarchLl. M. MirT. MedcalfI. S. QuaziJ. A. StrongL. R. WestD. R. BotterillR. W. ClifftT. R. EdgecockS. HaywoodP. R. NortonJ. C. ThompsonB. Bloch-devauxP. ColasH. DuarteS. EmeryW. KozaneckiE. LançonM. C. LemaireE. LocciB. MarxP. PerezJ. RanderJ. -F. RenardyA. RosowskyA. RoussarieJ. -P. SchullerJ. SchwindlingD. Si MohandB. VallageR. P. JohnsonA. M. LitkeG. TaylorJ. WearJ. G. AshmanW. BabbageC. N. BoothC. ButtarS. CartwrightF. CombleyI. DawsonL. F. ThompsonE. BarberioA. BöhrerS. BrandtG. CowanC. GrupenG. LuttersF. RiveraU. SchäferL. SmolikL. BosisioR. Della MarinaG. GianniniB. GobboF. RagusaL. BellantoniW. ChenJ. S. ConwayZ. FengD. P. S. FergusonY. S. GaoJ. GrahlJ. L. HartonO. J. HayesJ. M. NachtmanY. B. PanY. SaadiM. SchmittI. ScottV. SharmaZ. H. ShiJ. D. TurkA. M. WalshF. V. WeberLan Sau WuX. WuM. ZhengG. Zobernigsubject
PhysicsNuclear and High Energy PhysicsParticle physicsPhysicsElectron–positron annihilationHadronSolid angleElementary particleTracking (particle physics)b-taggingStandard ModelALEPH ExperimentNuclear physicsHigh Energy Physics::ExperimentALEPH experimentdescription
A measurement of the partial width ratio Γbb/Γhad using a method which tags the Z --> bb decays through the lif etime of the produced heavy hadrons is presented. This method relies on the tracking precision afforded by a double-sided silicon vertex detector. The tag algorithm makes a probabilistic interpretation of three-dimensional track impact parameters, using the data to measure the resolution. By tagging the two b hadrons separately, both Γbb/Γhad and the tag efficiency can be determined from the data. For a 26% efficiency of tagging a single b hadron within the vertex detector solid angle coverage, a purity of 96% is achieved. A value of Γbb/Γhad = 0.2192+/-0.0026(stat.)+/-0.0016(Γcc/ Γhad) is found. Combining this result with other recent ALEPH Γbb/Γhad measurements gives a 95% confidence upper limit on the Standard Model top mass of Mt < 228 GeV.
year | journal | country | edition | language |
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1993-09-01 | Physics Letters B |