6533b828fe1ef96bd12890ee

RESEARCH PRODUCT

Search for promptly produced heavy quarkonium states in hadronic Z decays

J. P. EngelLucio CerritoM. V. Castillo GimenezJ.d. RichardsonRichard JacobssonPaul DaunceyN. DemariaWinfried MitaroffG. DamgaardA. PetroliniLouis LyonsA. FirestoneR. AleksanA. BuysB. De LottoB. De LottoG. CrosettiEvgueni VlasovV. GraccoM. BerggrenH. PalkaG. VegniDemetrios LoukasF. StichelbautP. BuschmannB. MurynR. Mc KayKlaus MönigO. PodobrinFabrizio ParodiA. AndreazzaH. HerrM. A. HouldenS. Marti I GarciaP. PagesT. BrenkeL. G. TkatchevM. ZitoK. GrzelakA. SeitzM. PrestM. PrestC. GasparR. A. BrennerAllan HallgrenW. Da SilvaG. C. ZucchelliR. KeranenFrancisco MatorrasD. Souza-santosD. Souza-santosS. J. AlvsvaagE. AgasiR. LauhakangasPh. CharpentierDietrich LikoChariclia PetridouChariclia PetridouW.s.c. WilliamsF. RichardP. ChochulaC. MatteuzziS. AlmehedR. ChiericiF. HahnH. FoethV. LepeltierBranislav SitarM. RealeDaniel TreilleB. DalmagneM. GibbsMilos LokajicekM. BigiJ. RidkyV. ChorowiczMogens DamS. HoorelbekePaolo RoncheseM. DonszelmannC. ParkesMarc WinterPaolo ChecchiaPh. GavilletM. KaiserB. UeberschaerM. VerlatoD. VilanovaL. TortoraF. J. HarrisMaria Elena PolMaria Elena PolS. KatsanevasD. Y. BardinM. KarlssonN. J. KjaerCarlos LacastaDanilo ZavrtanikJ-c. MarinB. ErzenR. GokieliNikita SmirnovChiara MeroniJ. E. AugustinLydia RoosD. EdsallC. Martinez-riveroGoeran JarlskogG. GrosdidierR. SosnowskiP. VincentF. NaraghiJ. MacnaughtonC. TronconH. WahlenA. De AngelisP. CollinsAlessandra RomeroMaurizio CanepaA. RuizD. BertrandT. A. FilippasM. A E SchynsV. BocciP. NissM. ReglerJ. DreesGary John BarkerP. GunnarssonClaire BourdariosP. PaganiniSpyros TzamariasO. TchikilevG. TristramM. NieuwenhuizenPiotr ZalewskiDaniel BlochR. EhretJ. P. GerberF. CarenaPaolo PriviteraM. MazzucatoM. PindoC. CasoV. Ruhlmann-kleiderK. H. BecksE. VallazzaK. WoschnaggE. C. KatsoufisG. GopalA. G. OlshevskiEvangelos GazisP. AbreuAhmimed OuraouD. GeleO. YushchenkoR. SekulinR. BarateYu. SedykhD. J. HolthuizenL. De PaulaPhillip AllportW. RuckstuhlKlaus HamacherC. MaocunG. Della RiccaG. Della RiccaStefano RagazziA. Lopez-fernandezP. BruckmanH. MuellerM. PernickaE. FalkH. B. CrawleyW. KrupinskiLuis PeraltaF. KapustaU. SchwickerathF. ZachL. BrillaultJ. J. HernandezJ. W. LamsaS. S. MeyerY. SacquinF. SimonettoM. BlumeF. BaraoA. DeghorainT. MoaP. JalochaG. MaehlumTh. D. PapadopoulouA. G. FrodesenT. L. HessingM. DracosStanislav NemecekP. KubinecAriella CattaiG. ValentiAlexander ZaitsevN. PukhaevaMario SanninoM. GandelmanM. GandelmanJesus MarcoG. LenzenR. StrubJuan Abel BarrioV.a. UvarovF. FormentiF. CaoJ. P. TavernetL. ChaussardG. W. Van ApeldoomP. A. FischerA. GalloniS. O. HolmgrenMaria Roberta MongeE. HigonS. BosworthV. KostioukhineS. LamblotWolfgang AdamM. KoratzinosF. ScuriF. ScuriB. GolobTord EkelofT. BuranMarkus ElsingJ. DahmR. MoellerV. NikolaenkoJosé SaltF. PierreFares DjamaW. T. MeyerR. OravaZ. HajdukP. PoropatP. PoropatN. ErshaidatB. TomeBorge Svane NielsenVincent HedbergP. AntilogusD. W. LaneL. K. ResvanisA. M. WetherellMarek SzczekowskiW. Oberschulte-beckmannL. LanceriL. LanceriG. EigenYu. BelokopytovA. TomaradzeMaciej GórskiCristian StanescuP. BranchiniB. BouquetS. De BrabandereJacques LemonneKrzysztof DorobaC. ZacharatouJ. GarciaE. RossoH. KleinH. SchneiderM. DavenportJ. N. JacksonSandra AmatoK. BelousO. KouznetsovR. C. ShellardR. C. ShellardJosef HrubecStéphane PlaszczynskiKathy HuetG. EkspongG. BorisovG. LederValeriy PozdniakovK. D. BrandM. BaubillierAchille StocchiV. CanaleH. J. HilkeB. ÅSmanK. OsterbergAntonio OnofreWilliam TrischukA. MarkouN. I. ZiminA. M. SegarLaurent MirabitoR. ZuberiT. BologneseOlga BotnerMartino MargoniE. FokitisMassimo CacciaR. HenriquesV. ObraztsovMariusz WitekPer JönssonPeter KluitG. TranstromerJ. RamesGueorgui ChelkovImad Baptiste LaktinehP. HerquetM. GuntherI. RoncaglioloP. N. RatoffP. KokkiniasR. ContriS. SquarciaH. SaarikkoJ. DolbeauW. BoniventoP. BambadeF. FontanelliAlexander VodopyanovM. J. BatesM. BonesiniToralf Bernhard SkaaliL. BuggeA. J. Camacho RozasAntonio FerrerD. Z. ToetP. SiegristS. SimonettiCarmen GarcíaV. LefebureP. V. ChliapnikovTiziano RovelliM. PimentaP. JuillotRupert LeitnerG. PianaG. MatthiaeE. CortinaKerem CankocakT. BurgsmuellerD. GambaB. A. KhomenkoP.s.l. BoothUgo GaspariniC. K. LeganM. BegalliM. BegalliC. Vander VeldeCharles BricmanM. FeindtS. Sánchez NavasF. BianchiB. LoerstadManolis DrisI. RippT. TabarelliR. JanikD. CrennellK. A. DreesFrancesco NavarriaP. RoudeauT. SpassovA. MaioF. VerbeureP. LangefeldB. StuguUgo AmaldiW. De BoerE. ZevgolatakosAlberto BenvenutiP. RebecchiS. GumenyukH. RahmaniGuido BarbielliniGuido BarbielliniJ. GuyD. FassouliotisZ. KrumsteinE. K. JohanssonT. MaronP. NegriG. SciollaL. GornTim AdyeAlexander Lincoln ReadA. De MinA. TrombiniJ. ChauveauSteinar StapnesP. H. KramerPierre BilloirM. TyndelE. KarvelasI. SiccamaG. SajotJuan FusterJ. Cuevas MaestroP. SponholzL. MundimL. MundimF. LedroitI. A. TyapkinG. D. AlekseevC. DefoixF. Fulda-quenzerO. UllalandLeif J. JönssonRobert S. BrownN. VassilopoulosM. PetrovyckW. Van DoninckA. KlovningY. ArnoudU. MjoernmarkC. BosioT. TodorovM. WielersO. SmirnovaI. V. AjinenkoP. CarrilhoAndrei NomerotskiE. GrazianiM. BattagliaW. NeumannH. T. PhillipsVladimir CindroV. MalychevM. Mc CubbinJ. M. BrunetC. JoramVaclav VrbaK. HultqvistHans DijkstraA. MiagkovK. KarafasoulisF. DupontP. SeagerW. D. ApelLuc PapeB. FranekY. DufourM. L. TurluerSandor CzellarD. ReidL. Di CiaccioJan KrolikowskiN. N. KhovanskiW. BartlP. DelpierreJ. P. LaugierG. MyattPatrick JarryG. RinaudoG. PolokYu. GouzGianni ZumerleErnesto MiglioreAndromachi TsirouS. C. BlythG. WilkinsonJ. M. LopezE. I. RosenbergAndre AugustinusI. LippiK. KurvinenD. WickeJavier SánchezI. StavitskiPaul BaillonD. ZontarM. SzeptyckaKonstantinos PapageorgiouJ. H. WickensMarco PaganoniJose Luis ContrerasL. VitaleL. VitaleL. S. VertogradovF. Martinez-vidalD. RadojicicH. PerneggerManfred KrammerP. LutzM. L. AndrieuxWojciech KucewiczM. S. BilenkyL.j. CarrollJ. MedboFabio CossuttiFabio CossuttiP. WeilhammerT. LesiakA. N. SisakianM. MichelottoB. KoeneC. KreuterPaolo MorettiniJ. G. LokenC. De Saint-jeanP. BeilliereJosef StraussV. ChabaudM. Espirito SantoW. VenusW. HaoO. BarringR. NicolaidouA. BaroncelliI. KronkvistA. ZalewskaP. Van DamC. De La VaissiereThemistocles BowcockA. TilquinBarry KingE. SpiritiR. FrühwirthJ. TimmermansA. LipniackaA. SadovskyP. B. RentonD. C. FriesB. MarechalMarta CalviGeoffrey SmithL. VenturaK. YipR. LindnerY. LemoigneAndrea PerrottaM. WeierstallChristine KourkoumelisE. Dahl-jensenA. PasseriG. SmadjaJ. Van EldikT. S. HillM. SchimmelpfennigR. Mc NultyH. De BoeckB. Jean-marieM. PegoraroChiara MariottiM.a. Lopez AgueraS. HahnFrancesca Romana CavalloN. NeumeisterV. V. LapinC. De ClercqW. J. MurrayTiziano CamporesiG. CosmeP. J. HoltN. G. RedaelliMarco BozzoP. FrenkielJ. BaudotC. WalckA. NormandC. Weiser

subject

Systematic errorParticle physicsE+E ANNIHILATIONPhysics and Astronomy (miscellaneous)LUND MONTE-CARLOquarkonium stateHadron01 natural sciencesPartícules (Física nuclear)JET FRAGMENTATIONPHYSICSDirect production0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physicsLUND MONTE-CARLO; JET FRAGMENTATION; E+E ANNIHILATION; PHYSICSDELPHIPhysics010308 nuclear & particles physicsBranching fractionHigh Energy Physics::PhenomenologyQuarkoniumLARGE ELECTRON POSITRON COLLIDERDELPHI; quarkonium state; branching ratioVertex (geometry)PARTICLE PHYSICS; LARGE ELECTRON POSITRON COLLIDER; DELPHILarge Electron–Positron ColliderDecay lengthPARTICLE PHYSICSFísica nuclearHigh Energy Physics::Experimentbranching ratioParticle Physics - Experiment

description

A search has been made for direct production of heavy quarkonium states in more than 3 million hadronic Z^{0} decays in the 1991-1994 DELPHI data. Prompt J/\psi, \psi(2S) and \Upsilon candidates have been searched for through their leptonic decay modes using criteria based on the kinematics and decay vertex positions. New upper limits are set at the 90 \% confidence level for {Br( Z^0 \rightarrow \left( Q \bar{Q} \right) X ) / Br( Z^0 \rightarrow \mbox{hadrons})} for various strong production mechanisms of J/\psi and \Upsilon; these range down to 0.9 \times 10^{-4}. The limits are set in the presence of a small excess (\sim 1 \% statistical probability of a background fluctuation) in the sum of candidates from prompt J/\psi, \psi(2S), \Upsilon(1S), \Upsilon(2S) and \Upsilon(3S) relative to the estimated background.

10.1007/s002880050061https://hdl.handle.net/11368/2575032