Χc2 Formation in Two-Photon Collisions at LEP

M Acciarri,P Achard,O Adriani,M Aguilar-Benitez,J Alcaraz,G Alemanni,J Allaby,A Aloisio,MG Alviggi,G Ambrosi,H Anderhub,VP Andreev,T Angelescu,F Anselmo,A Arefiev,T Azemoon,T Aziz,P Bagnaia,L Baksay,A Balandras,RC Ball,S Banerjee,K Banicz,A Barczyk,R Barillere,L Barone,P Bartalini, M Basile,R Battiston,A Bay,F Becattini,U Becker,F Behner,J Berdugo,P Berges,B Bertucci,BL Betev,S Bhattacharya,M Biasini,A Biland,JJ Blaising,SC Blyth,GJ Bobbink,R Bock,A Bohm,L Boldizsar,B Borgia,D Bourilkov,M Bourquin,S Braccini,JG Branson,V Brigljevic,F Brochu,A Buffini,A Buijs,JD Burger,WJ Burger,J Busenitz,A Button,XD Cai, M Campanelli,M Capell,GC Romeo,G Carlino,AM Cartacci,J Casaus,G Castellini,F Cavallari,N Cavallo,C Cecchi,M Cerrada,F Cesaroni,M Chamizo,YH Chang,UK Chaturvedi,M Chemarin,A Chen,G Chen,GM Chen,HF Chen,HS Chen,X Chereau,G Chiefari, L Cifarelli,F Cindolo,C Civinini,I Clare,R Clare,G Coignet,AP Colijn,N Colino,S Costantini,F Cotorobai,B de la Cruz,A Csilling,TS Dai,JA van Dalen, R D'Alessandro,R de Asmundis,P Deglon,A Degre,K Deiters,D della Volpe,P Denes,F DeNotaristefani,A De Salvo,M Diemoz,D van Dierendonck,F Di Lodovico,C Dionisi,M Dittmar,A Dominguez,A Doria,MT Dova,D Duchesneau,D Dufournand,P Duinker,I Duran,H El Mamouni,A Engler,FJ Eppling,FC Erne,P Extermann,M Fabre,R Faccini,MA Falagan,S Falciano,A Favara,J Fay,O Fedin,M Felcini,T Ferguson,F Ferroni,H Fesefeldt,E Fiandrini,JH Field,F Filthaut,PH Fisher,I Fisk,G Forconi,L Fredj,K Freudenreich,C Furetta,Y Galaktionov,SN Ganguli,P Garcia-Abia,M Gataullin,SS Gau,S Gentile,N Gheordanescu,S Giagu,S Goldfarb,ZF Gong,MW Gruenewald,R van Gulik,VK Gupta,A Gurtu,LJ Gutay,D Haas,B Hartmann,A Hasan,D Hatzifotiadou,T Hebbeker,A Herve,P Hidas,J Hirschfelder,H Hofer,G Holzner,H Hoorani,SR Hou,I Iashvili,BN Jin,LW Jones,P de Jong,I Josa-Mutuberria,RA Khan,D Kamrad,JS Kapustinsky,M Kaur,MN Kienzle-Focacci, D Kim, DH Kim,JK Kim,SC Kim,WW Kinnison,J Kirkby,D Kiss,W Kittel,A Klimentov,AC Konig,A Kopp,I Korolko,V Koutsenko,RW Kraemer,W Krenz,A Kunin,P Lacentre,PL de Guevara,I Laktineh,G Landi,C Lapoint,K Lassila-Perini,P Laurikainen,A Lavorato,M Lebeau,A Lebedev,P Lebrun,P Lecomte,P Lecoq,P Le Coultre,HJ Lee,JM Le Goff,R Leiste,E Leonardi,P Levtchenko,C Li,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,M Maity,G Majumder,L Malgeri,A Malinin,C Mana,D Mangeol,P Marchesini,G Marian,JP Martin,F Marzano,GGG Massaro,K Mazumdar,RR McNeil,S Mele,L Merola,M Meschini,WJ Metzger,M von der Mey,D Migani,A Mihul,H Milcent,G Mirabelli,J Mnich,P Molnar,B Monteleoni,T Moulik,GS Muanza,F Muheim,AJM Muijs,S Nahn,M Napolitano,F Nessi-Tedaldi,H Newman,T Niessen,A Nippe,A Nisati,H Nowak,YD Oh,G Organtini,R Ostonen,C Palomares,D Pandoulas,S Paoletti,P Paolucci,HK Park,IH Park,G Pascale,G Passaleva,S Patricelli,T Paul,M Pauluzzi,C Paus,F Pauss,D Peach,M Pedace,YJ Pei,S Pensotti,D Perret-Gallix,B Petersen,S Petrak,D Piccolo,M Pieri,PA Piroue,E Pistolesi,V Plyaskin,M Pohl,V Pojidaev,H Postema,J Pothier,N Produit,D Prokofiev,J Quartieri,G Rahal-Callot,N Raja,PG Rancoita,G Raven,P Razis,D Ren,M Rescigno,S Reucroft,T van Rhee,S Riemann,K Riles,A Robohm,J Rodin,BP Roe,L Romero,S Rosier-Lees,S Roth,JA Rubio,D Ruschmeier,H Rykaczewski,S Sakar,J Salicio,E Sanchez,MP Sanders,ME Sarakinos,C Schafer,V Schegelsky,S Schmidt-Kaerst,D Schmitz,N Scholz,H Schopper,DJ Schotanus,J Schwenke,G Schwering,C Sciacca,D Sciarrino,L Servoli,S Shevchenko,N Shivarov,V Shoutko,J Shukla,E Shumilov,A Shvorob,T Siedenburg,D Son,B Smith,P Spillantini,M Steuer,DP Stickland,A Stone,H Stone,B Stoyanov,A Straessner,K Sudhakar,G Sultanov,LZ Sun,H Suter,JD Swain,Z Szillasi, XW Tang,L Tauscher,L Taylor,C Timmermans,SCC Ting,SM Ting,SC Tonwar,J Toth,C Tully,KL Tung,Y Uchida,J Ulbricht,E Valente,G Vesztergombi,I Vetlitsky,G Viertel,S Villa,M Vivargent,S Vlachos, H Vogel,H Vogt,I Vorobiev,AA Vorobyov,A Vorvolakos,M Wadhwa,W Wallraff, JC Wang,XL Wang,ZM Wang,A Weber,H Wilkens,SX Wu,S Wynhoff,L Xia, ZZ Xu,BZ Yang,CG Yang,HJ Yang,M Yang,JB Ye,SC Yeh,JM You,A Zalite,Y Zalite,P Zemp,Y Zeng,ZP Zhang,GY Zhu,RY Zhu,A Zichichi,F Ziegler,G Zilizi

Physics Letters B（1999）

Ist Nazl Fis Nucl

被引用32|浏览168

摘要

Two-photon formation of the charmonium resonance chi(c2), has been studied with the L3 detector at LEP. The chi(c2) is identified through its decay chi(c2) --> gamma J/psi, with a subsequent decay J/psi --> e(+)e(-) or J/psi --> mu(+)mu(-). With an integrated luminosity of 140 pb(-1) at root s similar or equal to 91 GeV and 52 pb(-1) at root s similar or equal to 183 GeV, we measure the two-photon width of the chi(c2) to be Gamma(gamma gamma)(chi(c2)) = 1.02 +/- 0.40 (stat.) +/- 0.15 (sys.) +/- 0.09(BR.) keV. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

更多

查看译文

关键词

charmonium

上传PDF