Determination of the production rate of D*0 mesons and of the ratio V/(V+P) in $$Z^0 \to c\bar c$$ decays

K Ackerstaff,J C Hill,P Taras,M Kolrep,P Scharff-Hansen,P Kyberd,R K Carnegie,C Markopoulos,R D Heuer,A Klier,P Mättig,E Tsur,D R Ward,F Scharf,R W Springer,D Karlen,W R Gibson,C Hartmann,J E Pilcher,B C Shen,V Kartvelishvili,W P Lai,D E Hutchcroft,J M Roney,C Couyoumtzelis,M Bobinski,R Bürgin,R G Kellogg,A Skillman,N I Geddes,S F Ashby,P Vikas,B Poli,S Orito,C Markus,A Sittler,K Stoll,D Lanske,M F Turner-Watson,J G Layter,T Kress,T Behnke,M J Oreglia,E Torrence,R Perez-Ochoa,A M Rossi,D Lazic,M S Dixit,P Vannerem,R L Coxe,G Duckeck,A Macpherson,B Stockhausen,K R Hossain,C K Hargrove,F Wäckerle,D E Plane,P S Wells,J Ludwig,A Michelini,S D Talbot,W Gorn,V Gibson,A T Watson,K Sachs,A Posthaus,O Sahr,F K Loebinger,A A Carter,M Foucher,A M Smith,F S Merritt,J Von Krogh,P Bock,M Sproston,N K Watson,T Kobayashi,A Schöming,D R Rust,K W Bell,F G Oakham,B Nellen,S R Lautenschlager,E A Mckigney,T Kawamoto,D M Gingrich,M J Goodrick,G M Dallavalle,J Pálinkás,J Gascon,C Dallapiccola,K Runge,R J Hemingway,M Hapke,M Boutemeur,T Saeki,A A Faust,G N Patrick,D C Imrie,P W Jeffreys,J Grunhaus,M Jones,W G Scott,P I Kayal,S Söldner-Rembold,D Chrisman,P Poffenberger,G Giacomelli,A Biguzzi,S M Gascon-Shotkin,R M Brown,C R Jones,P Gagnon,O C Cooke,R J Homer,N J Oldershaw,W Mohr,J Lauber,J Patt,A Fürtjes,M J Losty,E H Vokurka,T Geralis,M Hauschild,D Axen,A Joly,J P Martin,P Pfeifenschneider,A S Turcot,W M Sang,J Bechtluft,I P Duerdoth,A De Roeck,L A Del Pozo,P Utzat,R Mir,T J Mcmahon,T R Junk,A Rooke,B W Kennedy,D Zer-Zion,A D Schaile,R Van Kooten,M Jimack,J Goldberg,R Bartoldus,N Altekamp,F Odorici,M Gruwé,P Hüntemeyer,M Hansroul,O Schaile,C Y Chang,L Brigliadori,S D Bird,P M Watkins,H Mes,J W Gary,P Routenburg,H Voss,S A Robins,G Yekutieli,P G Estabrooks,M Fierro,I Lawson,S Braibant,D Lui,D G Fong,A Jawahery,A K Honma,M Thiergen,K Stephens,C M Hawkes,R J Barlow,V Zacek,E Lefebvre,J Steuerer,C P Ward,U Jost,H O Ogren,I Nakamura,T P Kokott,K J Anderson,J E Conboy,W J Mcdonald,I J Bloodworth,S Betts,I Cohen,G P Siroli,S Petzold,M Schumacher ,V Blobel ,Y Rozen ,S J Hillier ,Meirin Oan Evans ,P Krieger ,P Igo‐Kemenes ,M Verzocchi ,G Bella ,A Martín ,Roberto Giacomelli ,H Neal ,S Komamiya ,S J De Jong ,D Bonacorsi ,F Fiedler ,J R Pater ,M Kobel ,K Kawagoe ,F Fabbri ,J Letts ,E Barberio ,P Szymański ,P E.l Clarke ,J L Pinfold ,Uwe Rüppel ,J R Batley ,A Oh ,M Doucet ,A Wagner ,E Gross ,D Lellouch ,E Duchovni ,D Strom ,G D Long ,P A Hart ,P Sherwood ,A Montanari ,R A Mcpherson ,G W Wilson ,J Kirk ,G A Snow ,S L Lloyd ,S Schmitt ,I M Trigger ,C D Burgard ,J Schieck ,I Ueda ,L Felď ,R J Teuscher ,M Cuffiani ,J Meyer ,I Fleck ,C Rembser ,S Kluth ,A Skuja ,J A Wilson ,B Schmitt ,E Etzion ,Z L Trocsanyi ,D J Miller ,M Mannelli ,G Herten ,H Jérémie ,G Mikenberg ,T Mäshimo ,E K.g Sarkisyan ,Ö Runólfsson ,M Herndon ,J Allison ,P Schleper ,S Marcellini ,S Bethke ,J R.carter ,A H Ball ,D G Charlton ,Shinji Yamashita ,A Höcker ,R Keeler ,H Burckhart ,Robert Howard ,S Dado ,G Azuelos ,S Menke ,C Hajdú ,C Schwick ,Ch Geich-Gimbel ,J S White ,N Rodning ,A Macchiolo ,R Davis ,R Lahmann ,R Sobie ,A M Lee ,P Giacomelli ,R Kowalewski ,S Arcelli ,T Mori ,Eckhard Von Torne ,S Baumann ,K Desch ,S W O’neale ,P Capiluppi ,R J Hawkings ,O Biebel ,N Wermes ,B Dienes ,D I Futyan ,M Hildreth ,K Nagai ,P Jovanović ,M Schröder ,R Ströhmer ,R Folman ,H M Fischer ,D S Koetke ,R Nisius ,C H Shepherd-Themistocleous ,A Fanfani ,R Tafirout ,J Kanzaki ,G Pásżtor ,A Mincer ,H Evans ,D Horváth ,M Thomson ,S Anderson ,C Sbarra ,F Meijers ,S Towers ,S H Robertson ,C Grandi ,S Tarem ,J A Mckenna ,S Asai ,M Fanti ,L J Levinson ,G Martı́nez ,S Bentvelsen ,G Alexander ,D Eatough ,T R Wyatt ,B List ,P R Hobson ,T Shears ,G Hanson ,D Glenzinskí ,S Mihara ,K Ishii ,G Lafferty

doi:10.1007/s100529800894

Abstract

In e+e2212 collisions at centre-of-mass energies around 91 GeV, D*0 mesons have been reconstructed using data collected with the OPAL detector at LEP. The hadronisation fraction has been measured to be f(c→D*0)=0.218±0.054±0.045±0.007, where the errors correspond to the statistical and systematic errors specific to this analysis, and to systematic uncertainties from externally measured branching fractions, respectively. Together with previous OPAL measurements of the hadronisation fractions of other charmed mesons, this value is used to investigate the relative production of observed vector and pseudoscalar charmed mesons in $Z^0 \to c\bar c$ decays. The production ratio is determined to be PeffV = V/(V+P)=0.57±0.05. The relative primary production of vector and pseudoscalar mesons, Pvrim, is studied in the context of the production and decay of orbitally excited charmed resonances. The first measurement of the inclusive Ds*+ production rate in hadronic Z0 decays is presented.

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