6533b870fe1ef96bd12cf304

RESEARCH PRODUCT

Measurement of the partial width of the decay of the Z0 into charm quark pairs

U. Kruener-marquisM. L. TurluerD. ReidD. BertrandP. SiegristP. VazI. LippiJ-c. MarinP. LutzE. K. JohanssonD. BolliniP. B. RentonW. S. C. WilliamsSpyros TzamariasP. PoropatP. PoropatAndromachi TsirouP. V. ChliapnikovAndre AugustinusA. WehrEdoardo CastelliD. RadojicicE. MenichettiE. FokitisPaula EerolaD.n. EdwardsS. BiagiTiziano RovelliM. CrestiS. GawneWolfgang AdamM. DavenportJ. PyyhtiaR. KeranenL. PaperE. I. RosenbergP. FrenkielA. PasseriA. PasseriV.a. UvarovA. M. SegarV. NikolaenkoG. TrustramTord EkelofH. StaeckP. KapustaG. E. KalmusM. KostrikovF. GrardV. VrbaS. SquarciaF. CaoE. N. GazisB. KorzenR.b. KadyrovBengt Lund-jensenG. EkspongGiovanni DarboF. CouchotA. A. RademakersW. T. MeyerAnthony Lincoln ReadA. P. OstankovJ. BjarneH. PalkaItzhak RoditiNatale DemariaGueorgui ChelkovA. RuizG. R. WilkinsonC. Vander VeldeWojciech KucewiczL. TortoraT. TuuvaJ. N. JacksonS. O. HolmgrenM. SzczekowskiG. GaleazziA. FerrerL. S. VertogradovBorge Svane NielsenH. BurmeisterF. BaraoRoberto CirioL. K. ResvanisF. SimonettoE. LiebJ. J. LozanoM. H. GrosU. Nnau-lorzenM. S. BilenkyS. FerroniP. BambadeK. KurvinenP.s.l. BoothJ. LindgrenL.j. CarrollW. KlemptL. LyonsO. DollKrzysztof DorobaGeorge KalkanisChiara MeroniRobert S. BrownTiziano CamporesiKlaus HamacherM. BonapartMassimo CacciaJ. G. LokenS. D. HodgsonC. BricmanA. PulliaM. I. LaaksoL. O. EekR. C. ShellardJosef HrubecM. A. WinterS. SimonettiJ. MaillardT. A. FilippasT. HofmoklS. GumenyukR. A. BrennerAriella CattaiP. RonscheseD. BenedicE. HigonR. SeufertF. ScuriF. ScuriJ. SanxhezA. M. WetherellTh. D. PapadopoulouJ. H. BibbyPierre BilloirG. CosmeA. BaroncelliA. BaroncelliMarco BozzoM. J. BatesB. De LottoB. De LottoGuenakh MitselmakherG. CrosettiS. J. AlvsvaagLeif J. JönssonUgo GaspariniD. C. FriesP. WeilhammerI. BelokopytovD. HussonI. A. TyapkinT. S. SpassoffA. CampionM. PegoraroM. PernickaG. LenzenR. StrubJ. E. CampagneM. KoratzinosL. LanceriL. LanceriPaul BaillonE. C. KatsoufisG. MyattE. GrazianiE. GrazianiMikko VoutilainenP. S. IversenF. FontanelliH. FurstenauE. SanchisA. Lopez-fernandezMarta CalviL. Di CiaccioL. Di CiaccioC. DefoixP. SzymanskiA. FirestoneN. RedaelliJ. MarcoS. UeberschaerF. WaldnerF. WaldnerH. WahlenAriel GoobarUgo AmaldiH. ForsbachJ. W. LamsaGuido BarbielliniH. HerrL. G. TkatchevJose M. BenllochA. GrantMogens DamC. LambropoulosPatrick JarryG. RinaudoClara TronconJ. GuyW. De BoerGeoffrey SmithE.n. TsyganovJ. H. WickensW. DulinskiJose Luis ContrerasA. FenyukJ. H. KoehneM. PimentaK. WoschnaggB. A. KhomenkoA. De MinA. StocchiJoao VarelaHans DijkstraA. MarkouT. BuranN. De GrootP. BeltranM. VollmerP. DelpierreTim AdyeW. D. ApelB. FranekP. KluitM. MazzucatoU. RossiC. WalckPaolo GiacomelliJ. E. HooperFrancesco NavarriaL. VibertK. H. BecksG. W. Van ApeldoornM. P. ClaraG. D. AlekseevP. NegriJ. M. BrunetM. JonkerPierre AstierJ. ZúñigaM. BoratayP. AbreuP. BorgeaudR. SekulinA. ZalewskaM. BaubillierK. D. BrandE. VallazzaL. VenturaG. Hamel De MonchenaultH. SchneiderGöran JarlskogJan RidkyL. MathisT. MoaM.a. Lopez AgueraM. Mc CubbinK. HultqvistH. BornerC. PinoriB.d. HyamsMikael BerggrenS. RagazziA. SebastiaFrancesca Romana CavalloJosef StraussE. LillethumA. Letessier-selvonMitchell WayneP. ZalewskiV. LepeltierG. KantarjianB. GrosseteteAllan HallgrenVegniGiovanni ValentiF. UdoW. VenusG. MaehlumI. HerbstV. RuhlmannPaolo ChecchiaJacques LemonneJ. VelascoE. RossoH. KleinPh. GavilletV. V. LapinHans MullerFares DjamaV. CanaleN. K. VisnevskiyC. De ClercqF. KapustaL. BuggeJ. DreesP. D. DaunceyN. J. KjaerA. J. Camacho RozasG. SetteM. SessaM. SessaMaria Elena PolG. LederAlexander VodopyanovB. ÅSmanG. ZumerleL. CerritoF. BianchiP. N. BogolubovF. LedroitKjell FranssonS. KatsanevasP. PriviteraD. Z. ToetT. KreuzbergerD. VilanovaChristine KourkoumelisE. Dahl-jensenM. SchaefferD. Y. BardinP. BeilliereD. CrennellW. Van DoninckP. N. RatoffAndrea PerrottaF. AltedJ. DolbeauF. MandlG. SmadjaA. KlovningDaniel TreillePaul AllenR. LucockR. SosnowskiOlga BotnerKrzysztof KorcylA. TilquinJorge-armando Benitez GarciaU. MjoernmarkR. GokieliB. W. HeckP.i. ZarubinJ. J. HernandezJ. Cuevas MaestroP. O. HulthP. YepesM. ReglerC. J. BeestonJ. KrolikowskiN. MagnussenP. HerquetH. De BoeckV. FalaleevE. DaubieP. LaurikainenM. De BeerM. R. MongeB. Jean-marieS. BraibantS. TavernierM. TyndelM. BonesiniJ. A. M. A. BuytaertY. GouzN. CroslandG. GopalY. SacquinAndrey KorytovR. LlosaH. MuellerJ.m. GagoH. FoethD. WormaldR. ContriM. Fernandez AlonsoT. BologneseE. J. SanchezR. OravaU. TrevisanR. Zukanovich FunchalM. SzeptyckaW. BartlJ. WikneN. SmirnovV. PerevozchikovJ. A. Valls FerrerM. TuralaManolis DrisJ. P. GerberMario SanninoK. W. GlitzaP. RoudeauG. SkjevlingJ. P. LaugierF. StichelbautA. De AngelisA. De AngelisD. DelikarisR. DzhelyadinD. GambaC. StanescuC. StanescuR. LauhakangasN. Van EijndhovenE. ZevgolatakosG. VoulgarisF. VerbeureDaniel BlochAhmimed OuraouV.m. GolovatyukMarcos DracosB. BouquetJuan FusterM. KopfB. DalmagneLaurent ChevalierR. ZitounF. Fulda-quenzerP. KokkiniasMilos LokajicekJ. KestemanE. G. AnassontzisJ. P. EngelM. V. Castillo GimenezG. DamgaardO. PingotV. GraccoH. SaarikkoPavlos IoannouA.k. ToppholKlaus MoenigM. A. HouldenG. MatthiaeG. MatthiaeW. A. MitaroffF. RichardM. HahnF. NaraghiV. G. TimofeevS. AlmehedK. SpangF. HahnC. MatteuzziE. LillestolG. GrosdidierAlessandra RomeroI.a. GritsaenkoJ. E. AugustinA. ZaitsevS. HaiderA. N. SissakianClaudia J. StubenrauchEleuterio SpiritiEleuterio SpiritiC. CasoH. B. CrawleyP. MorettiniPierre JuillotB. KoeneA.n. DiddensD. LoukasM. CrozonR. PainV. ObraztsovO. BarringS. DagoretP. Van DamRenato TurchettaC. De La VaissiereG. ZhangPawel JalochaBarry KingR. FrühwirthJ. TimmermansP. BranchiniP. BranchiniG. E. TheodosiouM.d.m. De Fez LasoR. MoellerA. PinsentN. YamdagniM. T. TrainorSandor CzellarN. BrummerG. WormserPieter DavidW. H. RangeW. KrupinskiS. MaltezosH. J. HilkeJ. SkeensG. StavropoulosV. ChorowiczR. Mc KayN. I. ZimimF. AdamiJürgen H. WernerPhilippe CharpentierFrancisco MatorrasT. B. SkaaliF. J. HarrisA. G. FrodesenZ. HajdukMaciej GórskiA. HakanssonC. BosioC. BosioE. VlasovR. Holmes

subject

Nuclear and High Energy PhysicsParticle physicsE+E ANNIHILATIONMesonLUND MONTE-CARLOElectron–positron annihilationHadron01 natural sciencesJET FRAGMENTATIONCharm quarkStandard Modellaw.inventionNuclear physicsPHYSICSENERGYPionLUND MONTE-CARLO; D-STAR-MESON; E+E ANNIHILATION; JET FRAGMENTATION; CROSS-SECTION; PHYSICS; ENERGYlaw0103 physical sciences010306 general physicsColliderD-STAR-MESONNuclear ExperimentBosonPhysics010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyPhysique des particules élémentairesFísica nuclearHigh Energy Physics::ExperimentCROSS-SECTIONParticle Physics - Experiment

description

A determination of the partial width Γc̄ of the Z0 boson into charm quark pairs is presented, based on a total sample of 36 900 Z0 hadronic decays measured with the DELPHI detector at the LEP collider. The production rate of cc events is derived from the inclusive analysis of charged pions coming from the decay of charmed meson D*+-→D0π+ and D*-→D̄0π- where the π± is constrained by kinematics to have a low pT with respect to the jet axis. The probability to procedure these π± from D*± decay in cc events is taken to be 0.31±0.05 as measured at √S = 10.55 GeV. The measured relative partial width Γ∞/Γh = 0.162± 0.030(stat.) ± 0.050(syst.) is in good agreement with the standard model value of 0.171. Together with our previous measurement of the total hadronic width Γh this implies Γ∞ = 282 ± 53 (stat.) ± 88 (syst.) MeV.

10.1016/0370-2693(90)91096-thttps://doi.org/10.1016/0370-2693(90)91096-t