Upper limit on the lifetime difference of short- and long-lived B 0s mesons

M Acciarri,T Angelescu,S Wynhoff,H Anderhub,C Dionisi,L Romero,G Marian,A Barczyk,M Napolitano,M Wadhwa,J Rodin,B Monteleoni,N Gheordanescu,M Schneegans,S Shevchenko,I Korolko,R Barillère,A Pevsner,V Soulimov,P Bartalini,F Ferroni,J Alcaraz,P Laurikainen,A Lavorato,D Hatzifotiadou,M Gataullin,F Denotaristefani,B Borgia,K Sudhakar,S Costantini,C Lapoint,D Peach,G Sauvage,A Shvorob,A Kasser,Y Zhou,D Perret-Gallix,K Riles,A Engler,F Ziegler,M Pedace,I Vetlitsky,U Becker,J Busenitz,S Easo,P Le Coultre,G Passaleva,R Leiste,A Kunin,P De Jong,G Rahal-Callot,M Bourquin,G Landi,G Alemanni,A Gurtu,V Shoutko,N Shivarov,B De La Cruz,E Pistolesi,L Fredj,H Suter,J Hirschfelder,A Vorvolakos,G Hu,L Servoli,P Levtchenko,G Chiefari,S Reucroft,F Anselmo,S Petrak,A Chen,T Moulik,D Luckey,B Hartmann,W Kittel,T Azemoon,D Sciarrino,D Ruschmeier,E Fiandrini,A Lebedev,I Clare,A Buijs,E Shumilov,M Pauluzzi,E Valente,G Raven,R De Asmundis,P Duinker,M Steuer,H Vogt,Y Uchida,D Kirkby,A Kirkby,A Gougas,K Freudenreich,T Van Rhee,H El Mamouni,M Rescigno,G Mirabelli,P Lebrun,P Marchesini,D Duchesneau,C Palomares,R Van Gulik,N Raja,H Milcent,N Scholz,M Basile,B Bertucci,I Josa-Mutuberria,D Migani,C Furetta,A Degré,M Chemarin,Yu Galaktionov,G Viertel,O Rind,G Carlino,Y Karyotakis,M Lebeau,A Arefiev,F Marzano,A Buffini,R Ostonen,S Pensotti,R Faccini,D Boutigny,A Bay,J Ulbricht,G Castellini,M Chamizo,F Behner,L Tauscher,J Salicio,O Adriani,J Gerald,F Cesaroni,B Stoyanov,M Capell,G Zilizi,V Plyaskin,W Wallraff,G Coignet,G Ambrosi,G Schwering,S Sakar,F Muheim,F Cotorobai,M Vivargent,S Patricelli,J Casaus,S Braccini,P Zemp,H Postema,V Pojidaev,A Mihul,L Baksay,S Banerjee,H Nowak,H Hofer,S Bhattacharya,D Kamrad,T Siedenburg,D Kiss,T Paul,M Rattaggi,A Nippe,Y Zeng,A Robohm,K Lübelsmeyer,S Villa,A Hasan,F Di Lodovico,D Haas,P Berges,E Drago,V Koutsenko,W Krenz,J Schwenke,J Berdugo,P Extermann,S Schmidt-Kaerst,D Pandoulas,D Ren,A Favara,K Banicz,J Tóth,А Малинин ,J Kirkby,M N Kienzle‐Focacci ,P Hidas,S M Ting ,J Xu,J A Rubio ,D Stickland ,M Chen,M Biasini,Virendra K Gupta ,I Fisk,S C Tonwar ,Min Yang ,G Massaro ,T Ferguson,J D Burger ,A Dominguez,H Rykaczewski,A Aloisio,S X Wu ,F.C Erné,S Mele,R W Kraemer ,H Schopper,G Sultanov,J Pothier,Péter Molnár ,Z A Liu ,J C Wang ,G M Bilei ,N Colino,П Спиллантини ,D Kim,M Maity,S P Ahlen ,P Payat ,M Cerrada,A J.m Muijs ,A Biland,M A Falagán ,W W Kinnison ,J M You ,G Forconì ,H R Hoorani ,S Goldfarb,Y J Pei ,S Gentile,X L Wang ,P Lecomte,S C Kim ,P Bagnaia,D H Kim ,J H Field ,T Nießen ,V A Schegelsky ,B N Jin ,Ph Rosselet,R Böck ,A Weber,T Hebbeker,P H Fisher ,W J Metzger ,G Susinno ,A Böhm,I Durán ,M Dittmar,J J Blaising ,A Doria,L Taylor,Y S Lu ,M P Sanders ,C H Lin ,R A Khan ,L Merola,M Von Der Mey ,E Longo,S Rosier‐Lees ,A Maŕın ,Stefan Roth ,B L Betev ,W G ,P Paolucci,Y H Chang ,C Tully,D Mangeol,A Zalite ,L Malgeri,N Cavallo,A J.w Van Mil ,Z F Gong ,S N Ganguli ,G Romeo ,D Son,E Sánchez ,J Quartieri,U K Chaturvedi ,Á Csilling ,C Timmermans,A M Cartacci ,R C Ball ,P Denes,M W Gruenewald ,Z Z Xu ,L Gutay ,S Hou ,A Zichichi,L Barone,P.G Rancoita,W Lu,A K Kopp ,R Moore,Bryan Smith ,L Boldizsár ,L W Jones ,C Schäfer,H K Park ,R Mount,S C Yeh ,M Diemoz,H J Yang ,C Leggett,V Andreev ,C Sciacca,T Aziz,J P Martin ,G J Bobbink ,Gennaro De Pascale ,I Iashvili,Z P Zhang ,W Lustermann,K L Tung ,L Cifarelli,M Felcini,J Kapustinsky ,Yong Mei ,G Y Zhu ,M Pohl,S Nahn,F Cavallari,H B Newman ,S Giagu,H Vogel,W C Van Hoek ,J Allaby,P A Razis ,G Gratta,B Zhou,K Lassila-Perini,D Prokofiev,Z M Wang ,X W Tang ,C Cecchi,P Piroué ,T Dai ,G S Muanza ,J G Branson ,J B Ye ,P Ladrón De Guevara ,P Lecoq,C Civinini,M Kaur,P Garcı́a-Abia ,M Aguilar-Benı́tez ,Samuel C.C Ting,A P Colijn ,F.L Linde,J Mnich,F Pauß ,I C Brock ,N Produit,F Cindolo,B Z Yang ,I H Park ,B A Petersen ,D Schmitz,R D’alessandro ,A Baschirotto,M Meschini,D Van Dierendonck ,J Shukla,A Nisati,I Vorobiev,X D Cai ,E Leonardi,J M Le Goff ,S Paoletti,A Straessner,G Vesztergombi,H S Chen ,A A Vorobyov ,S S Gau ,C Paus,D Piccolo,S Vlachos,M T Dova ,L Z Sun ,J Swain ,V Brigljević ,D Bourilkov,W Lohmann,G Majumder,L Lista,D J Schotanus ,S Falciano,R Clare,F Becattini,S Riemann,F J Eppling ,H F Chen ,B P Roe ,A Klimentov,A C König ,H J Lee ,R Y Zhu ,Y D Oh ,G Chen,O L Fedin ,C G Yang ,S Blyth ,J K Kim ,C Li,W Lin ,Y Zalite ,C Luci,Howard A Stone ,G M Chen ,F Filthaut,L Luminari,H Fesefeldt,M E Sarakinos ,J Fay,K Deiters,C Y Chien ,C Mañá ,G Organtini,F Nessi‐Tedaldi ,A Hervé,M Pieri,Michel Fabre ,K Mazumdar,J Goldstein,M G Alviggi ,R Battiston,W J Burger ,M Campanelli

doi:10.1016/s0370-2693(98)01114-9

Abstract

An upper limit on the lifetime difference of short- and long-lived B 0 s mesons has been obtained using an inclusive bottom hadron sample from 2 million hadronic Z decays collected by the L3 experiment at LEP. A lifetime fit has been performed on data samples separately enriched in neutral and charged b hadrons. An experimental upper limit on the decay rate difference of short- and long-lived B 0 s mesons of (|ΔΓ|/Γ) B 0 s <0.67 (95% C.L.) has been determined. In addition, the lifetimes of B + and B 0 d mesons have been measured to be τ( B +)=1.66±0.06 ±0.03 ps and τ( B 0 d)=1.52±0.06 ±0.04 ps , where the first errors are statistical and the second are systematic.

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