6533b822fe1ef96bd127d8e4

RESEARCH PRODUCT

Measurement of the ratio using event shape variables

D. BuskulicI. De BonisD. DecampP. GhezC. GoyJ. P. LeesM. N. MinardB. PietrzykF. AriztizabalP. ComasJ. M. CrespoM. DelfinoI. EfthymiopoulosE. FernandezM. Fernandez BosmanV. GaitanL.l. 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. 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. S.t. DenisG. WolfR. AlemanyJ. BoucrotO. CallotA. CordierM. DavierL. DuflotJ. F. GrivazP.h. 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. MarchL.l. 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. WeberSau Lan WuX. WuM. ZhengG. ZobernigBenedetto D'ettorre Piazzoli

subject

PhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsBranching fractionHadronElementary particle01 natural sciences0103 physical sciencesTransverse momentumHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsALEPH experimentLeptonBar (unit)Event (probability theory)

description

Abstract The branching fraction of Z → b b relative to all hadronic decays of the Z has been measured using event shape variables to preferentially select Z → b b events. The method chosen applies a combination of shape discriminators and the selection of high transverse momentum leptons to event hemispheres. From a sample of 440 000 hadronic Z decays collected with the ALEPH detector at LEP, the ration Γ b b Γ had = 0.228±0.005( stat. )±0.005( syst. ) is measured.

https://doi.org/10.1016/0370-2693(93)90029-h