6533b828fe1ef96bd1288555

RESEARCH PRODUCT

Test of the flavour independence of αs

D. BuskulicD. CasperI. De BonisD. DecampP. GhezC. GoyJ.-p. LeesM.-n. MinardP. OdierB. PietrzykF. AriztizabalM. ChmeissaniJ.m. CrespoI. EfthymiopoulosE. FernandezM. Fernandez-bosmanV. GaitanLl. GarridoM. MartinezS. OrteuA. PachecoC. PadillaF. PallaA. PascualJ.a. PerlasF. SanchezF. TeubertD. CreanzaM. De PalmaA. FarillaG. IaselliG. MaggiN. MarinelliS. NataliS. NuzzoA. RanieriG. RasoF. RomanoF. RuggieriG. SelvaggiL. SilvestrisP. TempestaG. ZitoX. HuangJ. LinQ. OuyangT. WangY. XieR. XuS. XueJ. ZhangL. ZhangW. ZhaoG. BonviciniM. CattaneoP. ComasP. CoyleH. DrevermannA. EngelhardtR.w. FortyM. FrankM. GironeR. HagelbergJ. HarveyR. JacobsenP. JanotB. JostJ. KnoblochI. LehrausM. MaggiC. MarkouE.b. MartinP. MatoH. MeinhardA. MintenR. MiquelT. OestP. PalazziJ.r. PaterP. PerrodoJ.-f. PusztaszeriF. RanjardP. RensingL. RolandiD. SchlatterM. SchmellingO. SchneiderW. TejessyI.r. TomalinA. VenturiH. WachsmuthW. WiedenmannT. WildishW. WitzelingJ. WotschackZ. AjaltouniM. Bardadin-otwinowskaA. BarresC. BoyerA. FalvardP. GayC. GuicheneyP. HenrardJ. JoussetB. MichelS. MonteilJ-c. MontretD. PallinP. PerretF. PodlyskiJ. ProriolJ.-m. RossignolF. SaadiT. FearnleyJ.b. HansenJ.d. HansenJ.r. HansenP.h. HansenB.s. NilssonA. KyriakisE. SimopoulouI. SiotisA. VayakiK. ZachariadouA. BlondelG. BonneaudJ.c. BrientP. BourdonL. PassalacquaA. RougéM. RumpfR. TanakaA. ValassiM. VerderiH. VideauD.j. CandlinM.i. ParsonsE. FocardiG. ParriniM. CordenM. DelfinoC. GeorgiopoulosD.e. JaffeA. AntonelliG. BencivenniG. BolognaF. BossiP. CampanaG. CaponF. CeruttiV. ChiarellaG. FeliciP. LaurelliG. MannocchiF. MurtasG.p. MurtasM. Pepe-altarelliS.j. DorrisA.w. HalleyI. Ten HaveI.g. KnowlesJ.g. LynchW.t. MortonV. O'sheaC. RaineP. ReevesJ.m. ScarrK. SmithM.g. SmithA.s. ThompsonF. ThompsonS. ThornR.m. TurnbullU. BeckerO. BraunC. GewenigerG. GraefeP. HankeV. HeppE.e. KlugeA. PutzerB. RenschM. SchmidtJ. SommerH. StenzelK. TittelS. WernerM. WunschR. BeuselinckD.m. BinnieW. CameronD.j. CollingP.j. DornanN. KonstantinidisL. MonetaA. MoutoussiJ. NashG. San MartinJ.k. SedgbeerA.m. StaceyG. DissertoriP. GirtlerE. KneringerD. KuhnG. RudolphC.k. BowderyT.j. BrodbeckP. ColrainG. CrawfordA.j. FinchF. FosterG. HughesT. SloanE.p. WhelanM.i. WilliamsA. GallaA.m. GreeneK. KleinknechtG. QuastJ. RaabB. RenkH.-g. SanderR. WankeC. ZeitnitzJ.j. AubertA.m. BencheikhC. BenchoukA. BonissentG. BujosaD. CalvetJ. CarrC. DiaconuF. EtienneM. ThulasidasD. NicodP. PayreD. RousseauM. TalbyI. AbtR. AssmannC. BauerW. BlumD. BrownH. DietlF. DydakC. GotzheinK. JakobsH. KrohaG. LütjensG. LutzW. MännerH.-g. MoserR. RichterA. Rosado-schlosserA.s. SchwarzR. SettlesH. SeywerdU. StierlinR.st. DenisG. WolfR. AlemanyJ. BoucrotO. CallotA. CordierF. CouraultM. DavierL. DuflotJ.-f. GrivazPh. HeusseM. JacquetD.w. KimF. Le DiberderJ. LefrançoisA.-m. LutzG. MusolinoI. NikolicH.j. ParkI.c. ParkM.-h. SchuneS. SimionJ.-j. VeilletI. VideauD. AbbaneoP. AzzurriG. BagliesiG. BatignaniS. BettariniC. BozziG. CalderiniM. CarpinelliM.a. CiocciV. CiulliR. Dell'orsoI. FerranteL. FoàF. FortiA. GiassiM.a. GiorgiA. GregorioF. LigabueA. LusianiP.s. MarrocchesiA. MessineoG. RizzoG. SanguinettiA. SciabàP. SpagnoloJ. SteinbergerR. TenchiniG. TonelliG. TriggianiC. VanniniP.g. VerdiniJ. WalshA.p. BetteridgeG.a. BlairL.m. BryantY. GaoM.g. GreenD.l. JohnsonT. MedcalfLl.m. MirJ.a. StrongV. BertinD.r. BotterillR.w. ClifftT.r. EdgecockS. HaywoodM. EdwardsP. MaleyP.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 MohandA. TrabelsiB. VallageR.p. JohnsonH.y. KimA.m. LitkeM.a. McneilG. TaylorA. BeddallC.n. BoothR. BoswellS. CartwrightF. CombleyI. DawsonA. KoksalM. LethoW.m. NewtonC. RankinL.f. ThompsonA. BöhrerS. BrandtG. CowanE. FeiglC. GrupenG. LuttersJ. Minguet-rodriguezF. RiveraP. SaraivaL. SmolikF. StephanL. BosisioR. Della MarinaG. GanisG. GianniniB. GobboL. PitisF. RagusaJ. RothbergS. WasserbaechS.r. ArmstrongL. BellantoniP. ElmerZ. FengD.p.s. FergusonY.s. GaoS. GonzálezJ. GrahlJ.l. HartonO.j. HayesH. HuP.a. McnamaraJ.m. NachtmanW. OrejudosY.b. PanY. SaadiM. SchmittI.j. ScottV. SharmaJ.d. TurkA.m. WalshF.v. WeberSau Lan WuX. WuJ.m. YamartinoM. ZhengG. Zobernig

subject

QuarkPhysicsNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsElectron–positron annihilationPhysicsHadronFlavour01 natural sciencesALEPH ExperimentNuclear physics0103 physical sciencesStrong coupling010306 general physicsALEPH experimentIndependence (probability theory)Lepton

description

Abstract Using about 950000 hadronic events collected during 1991 and 1992 with the ALEPH detector, the ratios r b = α s b α s udsc and r uds = α s uds α s cb have been measured in order to test the flavour independence of the strong coupling constant α s . The analysis is based on event-shape variables using the full hadronic sample, two b -quark samples enriched by lepton tagging and lifetime tagging, and a light-quark sample enriched by lifetime antitagging. The combined results are r b = 1.002±0.023 and r uds = 0.971 ± 0.023.

10.1016/0370-2693(95)00713-uhttp://hdl.handle.net/10281/390316