Bose-Einstein Correlations of Neutral and Charged Pions in Hadronic Z Decays

P Achard,O Adriani,M Aguilar-Benitez,J Alcaraz,G Alemanni,J Allaby,A Aloisio,MG Alviggi,H Anderhub,VP Andreev,F Anselmo, A Arefiev,T Azemoon,T Aziz,M Baarmand,P Bagnaia,A Bajo,G Baksay,L Baksay,SV Baldew,S Banerjee,A Barczyk,R Barillere,P Bartalini,M Basile,N Batalova,R Battiston,A Bay,F Becattini,U Becker,F Behner,L Bellucci,R Berbeco,J Berdugo,P Berges, B Bertucci,BL Betev,M Biasini,M Biglietti,A Biland,JJ Blaising,SC Blyth,GJ Bobbink,A Bohm,L Boldizsar,B Borgia,S Bottai,D Bourilkov,M Bourquin,S Braccini,JG Branson,F Brochu,A Buijs,JD Burger,WJ Burger, XD Cai,M Capell,GC Romeo,G Carlino,A Cartacci,J Casaus,F Cavallari,N Cavallo,C Cecchi,M Cerrada,M Chamizo, YH Chang,M Chemarin,A Chen,G Chen,GM Chen, HF Chen,HS Chen,G Chiefari,L Cifarelli,F Cindolo,I Clare,R Clare,G Coignet,N Colino,S Costantini,B de la Cruz,S Cucciarelli,TS Dai,JA van Dalen,R de Asmundis,P Deglon,J Debreczeni, A Degre, K Deiters,D della Volpe,E Delmeire,P Denes, F DeNotaristefani,A De Salvo,M Diemoz,M Dierckxsens,D van Dierendonck,C Dionisi,M Dittmar,A Doria, MT Dova,D Duchesneau,P Duinker,B Echenard,A Eline,H El Mamouni,A Engler,FJ Eppling,A Ewers,P Extermann,MA Falagan,S Falciano,A Favara,J Fay,O Fedin,M Felcini,T Ferguson,H Fesefeldt,E Fiandrini,JH Field,F Filthaut,PH Fisher,W Fisher,I Fisk,G Forconi,K Freudenreich,C Furetta,Y Galaktionov,SN Ganguli,P Garcia-Abia,M Gataullin,S Gentile,S Giagu,ZF Gong,G Grenier,O Grimm,MW Gruenewald,M Guida,R van Gulik,VK Gupta,A Gurtu,LJ Gutay,D Haas,D Hatzifotiadou, T Hebbeker,A Herve,J Hirschfelder,H Hofer,G Holzner, SR Hou,Y Hu,BN Jin,LW Jones,P de Jong,I Josa-Mutuberria,D Kafer,M Kaur,MN Kienzle-Focacci, JK Kim,J Kirkby,W Kittel,A Klimentov,AC Konig,M Kopal,V Koutsenko,M Kraber,RW Kraemer,W Krenz,A Kruger,A Kunin,PL de Guevara,I Laktineh,G Landi,M Lebeau,A Lebedev,P Lebrun,P Lecomte,P Lecoq,P Le Coultre,HJ Lee, JM Le Goff,R Leiste,P Levtchenko,C Li,S Likhoded, CH Lin,WT Lin,FL Linde,L Lista,ZA Liu,W Lohmann,E Longo,YS Lu, K Lubelsmeyer,C Luci,D Luckey,L Luminari,W Lustermann,WG Ma,L Malgeri,A Malinin, C Mana,D Mangeol,J Mans,JP Martin,F Marzano,K Mazumdar,RR McNeil,S Mele,L Merola,M Meschini,WJ Metzger,A Mihul,H Milcent,G Mirabelli,J Mnich,GB Mohanty,GS Muanza,AJM Muijs,B Musicar,M Musy,S Nagy,M Napolitano,F Nessi-Tedaldi,H Newman,T Niessen,A Nisati,H Nowak,R Ofierzynski,G Organtini,C Palomares,D Pandoulas,P Paolucci,R Paramatti,G Passaleva,S Patricelli,T Paul,M Pauluzzi,C Paus,F Pauss,M Pedace,S Pensotti,D Perret-Gallix,B Petersen,D Piccolo,F Pierella,M Pioppi,PA Piroue,E Pistolesi,V Plyaskin,M Pohl,V Pojidaev,H Postema,J Pothier,DO Prokofiev,D Prokofiev,J Quartieri,G Rahal-Callot,MA Rahaman,P Raics,N Raja,R Ramelli,PG Rancoita,R Ranieri,A Raspereza,P Razis,D Ren,M Rescigno,S Reucroft,S Riemann,K Riles,BP Roe,L Romero,A Rosca,S Rosier-Lees,S Roth,C Rosenbleck,B Roux,JA Rubio,G Ruggiero,H Rykaczewski,A Sakharov,S Saremi,S Sarkar,J Salicio,E Sanchez, MP Sanders,C Schafer,V Schegelsky,S Schmidt-Kaerst,D Schmitz,H Schopper,DJ Schotanus,G Schwering, C Sciacca,L Servoli,S Shevchenko,N Shivarov,V Shoutko,E Shumilov,A Shvorob,T Siedenburg,D Son,P Spillantini,M Steuer,DP Stickland,B Stoyanov,A Straessner,K Sudhakar, G Sultanov,LZ Sun,S Sushkov,H Suter,JD Swain,Z Szillasi,XW Tang,P Tarjan,L Tauscher,L Taylor,B Tellili,D Teyssier,C Timmermans, SCC Ting, SM Ting,SC Tonwar,J Toth,C Tully, KL Tung,Y Uchida,J Ulbricht,E Valente, RT Van de Walle,V Veszpremi,G Vesztergombi,I Vetlitsky,D Vicinanza,G Viertel,S Villa,M Vivargent,S Vlachos,I Vodopianov,H Vogel,H Vogt,I Vorobiev,AA Vorobyov,M Wadhwa,W Wallraff,M Wang,XL Wang,ZM Wang,M Weber,P Wienemann,H Wilkens,SX Wu,S Wynhoff,L Xia,ZZ Xu,J Yamamoto, BZ Yang,CG Yang,HJ Yang,M Yang,SC Yeh,A Zalite,Y Zalite,ZP Zhang,J Zhao,GY Zhu,RY Zhu,HL Zhuang, A Zichichi,G Zilizi,B Zimmermann,M Zoller

Physics letters B（2002）

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摘要

Bose-Einstein correlations of both neutral and like-sign charged pion pairs are measured in a sample of 2 million hadronic Z decays collected with the L3 detector at LEP. The analysis is performed in the four-momentum difference range 300 MeV < Q < 2 GeV. The radius of the neutral pion source is found to be smaller than that of charged pions. This result is in qualitative agreement with the string fragmentation model.

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