6533b82efe1ef96bd1293e22

RESEARCH PRODUCT

MEASUREMENT OF THE TAU-POLARIZATION AT THE Z-RESONANCE

Damir BuskulicC BauerD DécampC GoyJ P LeesM N MinardB MoursB PietrzykR AlemanyF AriztizabalP ComasJ M CrespoM C DelfinoE FernándezM Fernández-bosmanV GaitanL GarridoT S MattisonA PachecoC PadillaA PascualD CreanzaM De PalmaA FarillaGiuseppe IaselliG MaggiM MaggiS NataliS NuzzoM QuattrominiA RanieriG RasoF RomanoF RuggieriG SelvaggiL SilvestrisP TempestaG ZitoY ChaiH HuD HuangX HuangJ LinT WangY XieD XuR XuJ ZhangL ZhangW ZhaoL A T BauerdickE BlucherG BonviciniJ BoudreauDavid William CasperH DrevermannRoger W FortyG GanisC GayR HagelbergJ HarveyS HaywoodJ M HilgartR JacobsenB JostJ KnoblochIvan LehrausT LohseA LusianiM MartínezP MatoH MeinhardAdolf G MintenA MiottoR MiquelH G MoserP PalazziJ A PerlasJ F PusztaszeriF RanjardG RedlingerLuigi RolandiJ E RothbergT RuanM SaichW D SchlatterM SchmellingF SefkowW TejessyH W WachsmuthW WiedenmannT WildishW WitzelingJ WotschackZiad J AjaltouniF BadaudMaria Bardadin-otwinowskaR El-fellousA FalvardP GayC GuicheneyP HenrardJ JoussetB MichelJ C MontretD PallinP PerretF PodlyskiJ ProriolF PrulhièreF SaadiTom FearnleyJ D HansenJ R HansenP H HansenR MøllerudB S NilssonI EfthymiopoulosA KyriakisErrietta SimopoulouAnna VayakiK ZachariadouJ BadierA BlondelG R BonneaudJ C BrientG FouqueS OrteuA RougéM RumpfR TanakaM VerderiH L VideauD J CandlinM I ParsonsE VeitchL MonetaG ParriniM CordenC H GeorgiopoulosM IkedaJ E LannuttiD A LevinthalMichael E MermikidesL SawyerS R WasserbaechA AntonelliR BaldiniG BencivenniG BolognaF BossiP CampanaG CaponF CeruttiV ChiarellaB D'ettorre-piazzoliG FeliciP LaurelliG MannocchiF MurtasG P MurtasL PassalacquaM Pepé-altarelliP PicchiP ColrainI Ten HaveJ G LynchW J 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 WunschA T BelkR BeuselinckDavid M BinnieW CameronM CattaneoD J CollingPeter J DornanS DugeayA M GreeneJ F HassardN M LieskeJ NashD G PayneM J PhillipsJ K SedgbeerI R TomalinA G WrightP GirtlerE KneringerD KuhnG RudolphC K BowderyT J BrodbeckA J FinchF FosterG HughesD JacksonN R KeemerM NuttallA D PatelTerence SloanS W SnowE P WhelanK KleinknechtJ RaabB RenkH G SanderH SchmidtF SteegS M WaltherR WankeB WolfJean-jacques AubertA M BencheikhC BenchoukA BonissentJ CarrP CoyleJ DrinkardF EtienneD NicodS PapalexiouP PayreL RoosD RousseauP SchwemlingM TalbyS AdlungR W AssmannWalter BlumD BrownPaolo Walter CattaneoBernd DehningH DietlFriedrich DydakM FrankA W HalleyJ LauberG LütjensGerhard LutzW MännerR H RichterHerbert RotscheidtJ SchröderA S SchwarzRonald SettlesH C J SeywerdU StierlinU StieglerR Saint-denisG WolfJ BoucrotO CallotA CordierM DavierL DuflotJ F GrivazP HeusseD E JaffeP JanotD W KimF R Le DiberderJ LefrançoisA M LutzM H SchuneJ J VeilletI VideauZ ZhangD AbbaneoG BagliesiG BatignaniL BosisioU BottigliC BozziG CalderiniM CarpinelliM A CiocciR Dell'orsoI FerranteF FidecaroL FoàE FocardiF FortiA GiassiM A GiorgiA GregorioF LigabueE B MannelliP S MarrocchesiA MessineoFabrizio PallaG RizzoG SanguinettiP SpagnoloJack SteinbergerRoberto TenchiniG TonelliG TriggianiC VanniniA VenturiP G VerdiniJ WalshA P BetteridgeJ M CarterM G GreenP V MarchL M MirT MedcalfI S QuaziJ A StrongL R WestDavid R BotterillR W ClifftT R EdgecockM EdwardsS M FisherT J JonesP R NortonD P SalmonJ C ThompsonB Bloch-devauxP ColasH DuarteWitold KozaneckiE LançonM C LemaireE LocciP PérezF PerrierJ RanderJ F RenardyA RosowskyA RoussarieJ P SchullerJ SchwindlingD Si MohandB VallageR P JohnsonA M LitkeG TaylorJ WearJohn Gavin AshmanW BabbageC N BoothC M ButtarR E CarneyS L CartwrightF CombleyF HatfieldL F ThompsonE BarbieroA BöhrerS BrandtG D CowanClaus GrupenG LuttersF RiveraU SchäferR Della MarinaG GianniniB GobboF RagusaL BellantoniW ChenD CinabroJ S ConwayD F CowenZ FengD P S FergusonY S GaoJ GrahlJ L HartonR C JaredB W LeclaireC LishkaPan Yi BinJ R PaterY SaadiM SchmittV SharmaZ H ShiA M WalshF V WeberWu Sau LanX WuM ZhengG Zobernig

subject

PhysicsParticle physicsPOLARIZATIONPhysics and Astronomy (miscellaneous)[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]010308 nuclear & particles physicsElementary particleLEP01 natural sciencesDECAYSALEPH Experiment0103 physical sciencesLEPTONS[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Polar coordinate systemQuantum field theory010306 general physicsEngineering (miscellaneous)ALEPH experimentParticle Physics - Experiment

description

Using 18.8 pb-1 of data collected in 1990 and 1991, ALEPH has measured the tau polarisation in the decay modes tau-->enunuBAR, tau-->mununuBAR, tau-->rhonu tau-->a1nu, using both the individual tau decay kinematics and the event acollinearity. The measurement of the tau polarisation as a function of the production polar angle yields the two parameters A(tau) and A(e), where A(l) = 2g(V)l g(A)l/[(g(V)l)2 + (g(A)l)2]. The results A(tau) = 0.143 +/- 0.023 and A(e) = 0. 120 +/- 0.026 are consistent with the hypothesis of electron-tau universality. Assuming universality yields a measurement of the effective weak mixing angle sin 2theta(W)eff = 0.2332 +/- 0.0022.

http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:A1993LU29800002&KeyUID=WOS:A1993LU29800002