6533b837fe1ef96bd12a1d44

RESEARCH PRODUCT

A measurement of αs from the scaling violation in e+e- annihilation

W. Da SilvaP. AbreuJuan Abel BarrioA. FirestonePierre JuillotE. BoudinovP. KubinecB. KoeneJ. H. WickensMarco PaganoniP. PagesU. SchwickerathA. NomerotskiK. WoschnaggM. J. BatesToralf Bernhard SkaaliJ. LibbyD. GambaF. FormentiE. C. KatsoufisV. ObraztsovF. VerbeureSandra AmatoC. PetridouT. PodobnikB. A. KhomenkoD. BertrandS. SquarciaB. StuguL. De PaulaG. JarlskogM. GandelmanF. CaoL. JonssonNorbert NeumeisterJiri ChudobaJ. D. DurandL. VitaleK. PapageorgiouT. TodorovR. LauhakangasPh. CharpentierF. Martinez-vidalD. RadojicicB. MurynImad Baptiste LaktinehD. Y. BardinH. SaarikkoA. G. OlshevskiM. MerkL. ChaussardPaolo MorettiniJ. G. LokenA. GrefrathP. GrisW. BoniventoE. CortinaA. PulliaA. C. BenvenutiO. PodobrinA. SadovskyP. LangefeldMingshui ChenR. EhretH. KleinC. De Saint-jeanP. BeilliereK. OsterbergL. GornR. HenriquesD. Souza-santosP. LutzW. RuckstuhlD. StampferT. BrenkeK. KorcylA. StocchiS-o. HolmgrenT. TabarelliP. RebecchiM. ZitoH. RahmaniF. SimonettoF. KapustaB. FranekH. J. HilkeW. NeumannT. BologneseA. ZalewskaR. SosnowskiJ. P. GerberK. GrzelakKlaus HamacherM. A. BizouardA. MarkouAriella CattaiManfred KrammerDenis GeléG. W. Van ApeldoornG. LederTord EkelofF. LedroitPaul BaillonB. ÅSmanO. BarringG. TranstromerKrzysztof NawrockiAllan HallgrenD. J. HolthuizenS. FichetS. GumenyukM. MichelottoL. VenturaK. YipB. SitarMartijn MuldersI. RoncaglioloT. SpassovJ. E. AugustinW. T. MeyerD. LoukasJacques LemonneO. KlappF. NaraghiG. VegniJ. M. HeuserD.c. FriesM. CanepaU. MjoernmarkT. G M MalmgrenH. WahlenJ. H. CowellA. TrombiniChiara MariottiR. GokieliAndre TilquinL.n. GerdyukovP. SiegristPierre BilloirMaurizio BonesiniK. KarafasoulisA. Di DiodatoA. BaroncelliA. Van LysebettenSandor CzellarH. MuellerM. L. TurluerI. KronkvistYu. GouzJ-c. MarinD. ReidB. ErzenK. MuenichBorge Svane NielsenS. De BrabandereKrzysztof DorobaV. LefebureD. CrennellF. MandlG. SmadjaG. SajotErnesto MiglioreN. RedaelliLaurent MirabitoM. VerlatoW. D. ApelP. KokkiniasC. KreuterChiara MeroniLouis LyonsR. LindnerA. De AngelisP. D. DaunceyF. ZachA. G. FrodesenMogens DamA. MaioG. ValentiP. BruckmanS. HoorelbekePeter KluitK. H. BecksP. GunnarssonO. TchikilevW. KucewiczS. HahnWolfgang AdamG. A. ChelkovPaolo RoncheseN. J. KjaerMario SanninoA. KlovningC. BosioGianni ZumerleN. PukhaevaB. BouquetYu. BelokopytovM. BarbiM. WeierstallK. RybickiS. TzamariasH. T. PhillipsVladimir CindroR. MoellerRobert S. BrownB. Jean-marieP. Van DamS. AlmehedS. Marti I GarciaD. EdsallJ.d. RichardsonJ. DahmP. HerquetP. PoropatO. SahrM. A. WinterRichard JacobssonL. PeraltaJorge-armando Benitez GarciaVaclav VrbaNatale DemariaMartino MargoniE. FokitisV. V. LapinHans DijkstraR. OravaAndromachi TsirouB. LoerstadF. BaraoAndre AugustinusM. GuntherA. MiagkovG. BarbielliniT. J. V. BowcockJ. R. MahonD. FassouliotisChristine KourkoumelisL. K. ResvanisJ. BaudotI. A. TyapkinG. MaehlumM. PimentaC. GreenG. TristramA.n. SisakianT. BurgsmuellerUgo AmaldiN. N. KhovanskiW. BartlJ. SanchezPiotr ZalewskiC. De ClercqRupert LeitnerG. MatthiaeB. D'almagneM. KaiserG. EigenAlessandra RomeroW. J. MurrayE. Dahl-jensenG. D. AlekseevR. PainA. SeitzB. De LottoP. BuschmannR. Mc KayT. BuranG. CrosettiEvgueni VlasovMarkus ElsingM. BozzoMatteo PegoraroR. A. BrennerG. MyattF. PierrePatrick JarryG. SciollaManolis DrisA. GalloniA. RuizM. L. AndrieuxL. S. VertogradovJosef StraussM. A E SchynsE. VallazzaV. ChabaudD. BertiniJ. P. LaugierA. AndreazzaG. RinaudoJ. M. LopezP. SeagerM. Espirito SantoP. RoudeauJ. SaltV.a. UvarovR. StrubW. VenusS. TodorovaMassimo CacciaA. FerrerD. W. LaneZ. HajdukL. Di CiaccioJosef HrubecT. RovelliM. BattagliaJ. DolbeauJuan FusterP. BambadeR. JanikB. TomeM. WielersM. S. BilenkyJ. W. LamsaM. PetrovyckBarry KingH. PalkaP. V. ChliapnikovP.s.l. BoothS. MeyerA. M. SegarR. C. ShellardVladimir NikolaenkoM. BlumeV. GraccoD. ZavrtanikA. DeghorainJ. N. JacksonJ. RamesE. SpiritiIvano LippiJiri MasikG. EkspongW.s.c. WilliamsL.j. CarrollP. N. RatoffCharles BricmanL. SerbelloniV. HedbergP.a. FischerR. FrühwirthM. R. MongeG. PianaR. Mc NultyI. V. AjinenkoM. Mc CubbinK. HultqvistP. B. RentonOlga BotnerE. HigonR. KeranenJ. MedboJ. TimmermansC. K. LeganM. TyndelG. J. BarkerV. ChorowiczL. G. TkatchevPhillip AllportE. I. RosenbergL. M. MundimG. Della RiccaM. SchimmelpfennigC. CasoA. PetroliniFrancisco MatorrasH. B. CrawleyRafael MarcoFabio CossuttiP. ChochulaP. WeilhammerS. CabreraC. GasparK. KurvinenD. WickeC. Martinez-riveroA. B. FenyukG. C. ZucchelliA. M. WetherellF. L. NavarriaF. R. CavalloJakita O. ThomasCarmen GarcíaMaciej GórskiL. LanceriP. VincentK. StevensonT. LesiakS. SimonettiM. BegalliTiziano CamporesiG. CosmeE. KarvelasH. FoethE. FalkM. BerggrenB. MarechalS. KatsanevasP. J. HoltM. KarlssonM. E. PolZ. KrumsteinV. LepeltierP. NissRosy NicolaidouT. L. HessingMarta CalviT. A. FilippasVincenzo CanaleW. De BoerCristian StanescuP. BranchiniB. UeberschaerM. MazzucatoPaolo ChecchiaP. AntilogusP. FrenkielPh. GavilletFabrizio ScuriL. TortoraJ. MacnaughtonF. J. HarrisGeoffrey SmithA. De MinA. PasseriW. KrupinskiH. SchneiderC. WalckG. WilkinsonR. ReinhardtYu.a. KhokhlovD. VilanovaP. CollinsA. NormandClaire BourdariosV. Ruhlmann-kleiderYu. SedykhM. NieuwenhuizenFlavio FontanelliR. ContriCarlos LacastaB. GolobDaniel BlochW. A. MitaroffAhmimed OuraouG. OraziH. HerrY. SacquinS. NavasUgo GaspariniA. DjannatiAnna LipniackaK. A. DreesKathy HuetValeriy PozdniakovI. StavitskiC. WeiserJulien GuyF. RichardD. ZontarAlexander Lincoln ReadM. SzeptyckaMarc BesanconO. KouznetsovTh D. PapadopoulouC. DefoixF. Fulda-quenzerLuc PapeE. GrazianiO. SmirnovaM. DavenportJ. M. BrunetO. YushchenkoW. Oberschulte-beckmannR. SekulinJ. Van EldikHeinz PerneggerR. AlemanyP. JonssonKerem CankocakTim AdyeT. S. HillT. MoaP A. DelpierreR. ChiericiAmiran TomaradzeFares DjamaC. JoramO. UllalandM. WitekMarcos DracosF. HahnC. MatteuzziSamo StaničG. PolokLydia RoosJ. DreesClara TronconEvangelos GazisJ. J. HernandezJ. P. EngelM. V. Castillo GimenezG. DamgaardC. De La VaissiereFabrizio ParodiR. SilvestreK. D. BrandKlaus MoenigM. A. HouldenN. I. ZiminS. RagazziE. K. JohanssonSteinar StapnesN. VassilopoulosV. MalychevG. GrosdidierL. BuggeA. J. Camacho RozasD. Z. ToetI. RippM. FeindtP. NegriP. SponholzT. WlodekCh. JarlskogG. P. GopalP. JalochaDietrich LikoP. PriviteraM. RealeDaniel TreilleM. BigiE. ZevgolatakosJ. RidkyC. ParkesJ. P. TavernetA. PerrottaM. BaubillierA. M. ZaitsevAlexander VodopyanovF. BianchiPascal PaganiniNikita SmirnovF. CarenaM. SzczekowskiM. PernickaJesus MarcoG. LenzenV. KostioukhineM. KoratzinosA. TonazzoJ. Cuevas Maestro

subject

QuarkNuclear and High Energy PhysicsParticle physicsE+E ANNIHILATIONElectron–positron annihilationFRAGMENTATION FUNCTIONSHadronHADRONIC-Z-DECAYS; JET PRODUCTION-RATES; E+E ANNIHILATION; FRAGMENTATION FUNCTIONS; ENERGY CORRELATIONS; PERTURBATIVE QCD; RESONANCE; EVOLUTION; PARTICLE; TESTS01 natural sciencesPartícules (Física nuclear)Nuclear physicsRenormalizationViolació CP (Física nuclear)0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]PERTURBATIVE QCD010306 general physicsNuclear ExperimentScalingDetectors de radiacióDELPHIPhysicsAnnihilation010308 nuclear & particles physicsJET PRODUCTION-RATESHigh Energy Physics::PhenomenologyPerturbative QCDRESONANCELARGE ELECTRON POSITRON COLLIDEREVOLUTIONDGLAPENERGY CORRELATIONSPARTICLE PHYSICS; LARGE ELECTRON POSITRON COLLIDER; DELPHITESTSPARTICLE PHYSICSHigh Energy Physics::ExperimentPARTICLEParticle Physics - ExperimentHADRONIC-Z-DECAYS

description

The hadronic fragmentation functions of the various quark flavours and of gluons are measured in a study of the inclusive hadron production from $\zz$ decays with the DELPHI detector and are compared with the fragmentation functions measured elsewhere at energies between 14 GeV and 91 GeV. A large scaling violation is observed, which is used to extract the strong coupling constant from a fit using a numerical integration of the second order DGLAP evolution equations. The result is \begin{displaymath} \alpha_s(M_Z) = 0.124^{+0.006}_{-0.007}(exp)\pm 0.009 (theory) \end{displaymath} where the first error represents the experimental uncertainty and the second error is due to the factorization and renormalization scale dependence.

yearjournalcountryeditionlanguage
1997-01-01
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