Inclusive production of neutral vector mesons in hadronic Z decays

M Letho,A Putzer,A Moutoussi,D Si Mohand,F Bossi,M Bardadin-Otwinowska,J Rothberg,G Musolino,F Ranjard,R Beuselinck,O Schneider,S Thorn,J L Harton,O Braun,W T Morton,C Vannini,H Wachsmuth,P Colas,P Campana,W M Newton,G Lutters,G Batignani,O Callot,A M Greene,H Seywerd,P S Marrocchesi,P R Norton,H Drevermann,Q Ouyang,H Videau,G Rizzo,T Fearnley,F Podlyski,M Thulasidas,G Graefe,B Marx,G Sanguinetti,C Guicheney,P Odier,C Bozzi,J Grahl,R Alemany,J A Perlas,H Meinhard,W Tejessy,B Vallage,R St Denis,R Fantechi,C Boyer,F Saadi,V Hepp,F Etienne,R Hagelberg,M Corden,H Duarte,A S Thompson,J D Hansen,D J Candlin,A Farilla,I Abt,E Simopoulou,S Emery,U Stierlin,J K Sedgbeer,P Tempesta,A Roussarie,A Galla,G Lütjens,B Pietrzyk,H Dietl,G Mannocchi,F Rivera,A Rosado-Schlosser,G Bujosa,J A Strong,T J Brodbeck,A Cordier,F Dydak,S Bettarini,F Teubert,J Boucrot,A Lusiani,C K Bowdery,S Werner,K Zachariadou,A P Betteridge,S Schael,M Carpinelli,C Benchouk,G Crawford,B Michel,I Lehraus,G Felici,J Minguet-Rodriguez,P Maley,M Rumpf,M Pepe-Altarelli,A M Bencheikh,M Chmeissani,J Knobloch,I Videau,C Markou,A Trabelsi,C N Booth,J Lefrançois,F Forti,A Engelhardt,S Monteil,D Schlatter,R Xu,D M Binnie,P Bourdon,R Settles,A Rougé,T Medcalf,J Wotschack,P Henrard,A Vayaki,C Zeitnitz,A Blondel,B Bloch-Devaux,W Orejudos,P Girtler,W Witzeling,A Böhrer,M Schmelling,J Jousset,G Capon,P Reeves,T Oest,F Ariztizabal,G Gelao,C Gotzhein,G Giannini,G Parrini,U Becker,F Combley,W Kozanecki,L Passalacqua,R W Clifft,A Ranieri,B Jost,A Pacheco,Y Saadi,P Comas,C Rankin,E E Kluge,M C Lemaire,P Colrain,M Jacquet,G Rudolph,A M Walsh,W Blum,G Hughes,P J Dornan,F Courault,I G Knowles,D Buskulic,A Valassi,S Orteu,G Bencivenni,G Triggiani,E P Whelan,G Bonvicini,W Cameron,L M Bryant,W Männer,G Bologna,M Wunsch,A Koksal,C Georgiopoulos,F Thomson,B Renk,L Bellantoni,V Gaitan,S Natali,M Verderi,F Foster,C Bauer,F Ruggieri,B Rensch,B Gobbo,P Payre,P Palazzi,A Minten,J C Brient,I Ferrante,M Delfino,M G Green,A M Stacey,J Schwindling,P Perret,L Bosisio,P Perrodo,D Nicod,K Tittel,A Antonelli,J M Scarr,Ll Garrido,F Murtas,J Sommer,I Siotis,P Coyle,A Gregorio,C Geweniger,G Calderini,M Davier,J Raab,J Steinberger,G Tonelli,H J Park,V Ciulli,J Zhang,Á Pascual ,V Chiarella,C Raine,V Sharma,I De Bonis ,M Zheng,L.f Thompson ,L Duflot,I C Park,R Miquel,J P Schuller ,A Venturi,G Iaselli,V Bertín ,Р Тенчини ,E Focardi,R Richter,P Elmer,A Messineo,H Stenzel,M Talby,R Assmann,R Forty ,E Kneringer,K Kleinknecht,J Rander,T Wildish,L Moneta,K Jakobs,L Silvestris,J F Renardy ,G Ganis,R Dell’Orso,P Pérez ,D Pallin,F Palla,A Giassi,G R Bonneaud ,M.i Williams ,Ph Ghez ,R Edgecock ,A Barrès ,J D Turk,K M Smith ,A Sciabà,J R Hansen,G Bagliesi,P H Hansen,P Janot,G Lütz ,J B Hansen,A Rosowsky,J C Montret ,J Walsh,C Diaconu,Z Feng,A Colaleo,S Nuzzo,N Marinelli,G Raso,P G Verdini,M A Ciocci,R Della Marina ,Y Gao,D Décamp ,J.m Crespo ,M Apollonio,S Wasserbaech,A Falvard,G Quast,M Edwards,R.m Turnbull ,J.a Nash ,Y Pan ,L M Mir ,I Ten Have ,R Tanaka,D Abbaneo,I Scott ,P Hanke,P Mató ,J P Lees ,A Bonissent,J Carr,P Van Gemmeren ,F Ragusa,F Le Diberder ,J R Pater,Michael G Schmidt ,D Calvet,G Zobernig,C Grupen,Siegmund Brandt ,P Laurelli,D Brown,D Johnson ,S L Wu ,A J Beddall ,I Dawson,She‐Sheng Xue ,H Y Kim,G.n Taylor ,H Kroha,P Azzurri,A J Finch,S J Haywood ,Z Ajaltouni,D Casper,M Fernández-Bosman ,J J Veillet ,E Fernández ,X T Huang ,G Cowan,E Locci,D Rousseau,J M Yamartino,O.j Hayes ,N Konstantinidis,I R Tomalin,J M Rossignol ,E B Martin,P Rensing,E Lançon,S J Dorris,G Dissertori,G Selvaggi,X Wu,D.p.s Ferguson ,D W Kim,J F Pusztaszeri ,Peter Mcnamara ,W Zhao,M Girone,S Simion,T Wang,F Ligabue,J.j Aubert ,J Lin,D Botterill ,S González,S.r Armstrong ,G Wolf,P Heusse ,H G Sander ,A Kyriakis,Y Xie,L Smolík ,Rod Boswell ,M.-N Minard ,S Cartwright,M De Palma ,D Colling ,M Martı́nez ,L Foà,R.p Johnson ,Hongbo Hu ,C Goy,Irena Nikolić ,Pedro Saraiva ,G Zito,J Proriol,D E Jaffe,R Wanke,F J Munoz Sanchez ,I Efthymiopoulos,L Zhang,V O’Shea,A M Litke,M H Schune ,J.-F Grivaz ,F Stephan,M Schmitt,H G Moser ,C Padilla Aranda ,M A Giorgi,J M Nachtman,A M Lutz ,F Cerutti,M Cattaneo,M G Smith,A Lucotte,J.g Lynch ,F Romanò ,G Mäggi ,R.g Jacobsen ,P Spagnolo,T Sloan,Eric O Feigl ,B.s Nilsson ,M I Parsons,M.a Mcneil ,D Creanza,D Kühn ,G.a Blair ,G Rolandi ,G Martin ,J.c Thompson ,W Wiedenmann,A.w Halley ,J Harvey,M Frank,M Maggi

doi:10.1007/bf02907418

Abstract

Data on the inclusive production of the neutral vector mesonsρ 0(770),ω(782), K*0(892), andφ(1020) in hadronic Z decays recorded with the ALEPH detector at LEP are presented and compared to Monte Carlo model predictions. Bose-Einstein effects are found to be important in extracting a reliable value for theρ 0 production rate. An averageρ 0 multiplicity of 1.45±0.21 per event is obtained. Theω is detected via its three pion decay modeω→π + π − π 0 and has a total rate of 1.07±0.14 per event. The multiplicity of the K*0 is 0.83±0.09, whilst that of theφ is 0.122±0.009, both measured using their charged decay modes. The measurements provide information on the relative production rates of vector and pseudoscalar mesons, as well as on the relative probabilities for the production of hadrons containing u, d, and s quarks.

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