Measurement of the B-d(0)-(B)over-bar(d)(0) oscillation frequency M Acciarri , O Adriani , M Aguilar-Benitez , S Ahlen , 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 , RC Ball , S Banerjee , K Banicz , A Barczyk , R Barillere , L Barone , P Bartalini , A Baschirotto , 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 , GM Bilei , R Bizzarri , JJ Blaising , SC Blyth , GJ Bobbink , R Bock , A Bohm , L Boldizsar , B Borgia , D Bourilkov , M Bourquin , D Boutigny , S Braccini , JG Branson , V Brigljevic , IC Brock , A Buffini , A Buijs , JD Burger , WJ Burger , J Busenitz , 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 , SV Chekanov , M Chemarin , A Chen , G Chen , GM Chen , HF Chen , HS Chen , M Chen , G Chiefari , CY Chien , L Cifarelli , F Cindolo , C Civinini , I Clare , R Clare , HO Cohn , G Coignet , AP Colijn , N Colino , S Costantini , F Cotorobai , B de la Cruz , A Csilling , TS Dai , R D'Alessandro , R de Asmundis , A Degre , K Deiters , P Denes , F DeNotaristefani , D DiBitonto , M Diemoz , D van Dierendonck , F Di Lodovico , C Dionisi , M Dittmar , A Dominguez , A Doria , MT Dova , E Drago , D Duchesneau , P Duinker , I Duran , S Dutta , S Easo , Y Efremenko , H El Mamouni , A Engler , FJ Eppling , FC Erne , JP Ernenwein , P Extermann , M Fabre , R Faccini , S Falciano , A Favara , J Fay , O Fedin , M Felcini , B Fenyi , T Ferguson , F Ferroni , H Fesefeldt , E Fiandrini , JH Field , F Filthaut , PH Fisher , I Fisk , G Forconi , L Fredj , K Freudenreich , C Furetta , T Galaktionov , SN Ganguli , P Garcia-Abia , SS Gau , S Gentile , J Gerald , N Gheordanescu , S Giagu , S Goldfarb , J Goldstein , ZF Gong , A Gougas , G Gratta , MW Gruenewald , VK Gupta , A Gurtu , LJ Gutay , D Haas , B Hartmann , A Hasan , D Hatzifotiadou , T Hebbeker , A Herve , J Hirschfelder , WC van Hoek , H Hofer , H Hoorani , SR Hou , G Hu , V Innocente , K Jenkes , BN Jin , LW Jones , P de Jong , I Josa-Mutuberria , A Kasser , RA Khani , D Kamrad , Y Kamyshkov , JS Kapustinsky , Y Karyotakis , M Kaur , MN Kienzle-Focacci , D Kim , DH Kim , JK Kim , SC Kim , WW Kinnison , A Kirkby , D Kirkby , 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 , D 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 , C Leggett , 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 , W Lu , 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 , S Mangla , P Marchesini , A Marin , JP Martin , F Marzano , GGG Massaro , D McNally , S Mele , L Merola , M Meschini , WJ Metzger , M von der Mey , Y Mi , D Migani , A Mihul , AJW van Mil , H Milcent , G Mirabelli , J Mnich , P Molnar , B Monteleoni , R Moore , T Moulik , R Mount , F Muheim , AJM Muijs , S Nahn , M Napolitano , F Ness-Tedaldi , H Newman , T Niessen , A Nippe , A Nisati , H Nowak , YD Oh , H Opitz , G Organtini , R Ostonen , S Palit , 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 , YJ Pei , S Pensotti , D Perret-Gallix , B Petersen , S Petrak , A Pevsner , D Piccolo , M Pieri , PA Piroue , E Pistolesi , V Plyaskin , M Pohl , V Pojidaev , H Postema , N Produit , D Prokofiev , J Quartieri , G Rahal-Callot , N Raja , PG Rancoita , M Rattaggi , G Raven , P Razis , K Read , D Ren , M Rescigno , S Reucroft , S Riemann , K Riles , O Rind , A Robohm , J Rodin , BP Roe , L Romero , S Rosier-Lees , P Rosselet , W van Rossum , S Roth , JA Rubio , D Ruschmeier , H Rykaczewski , J Salicio , E Sanchez , MP Sanders , ME Sarakinos , S Sarkar , G Sauvage , C Schafer , V Schegelsky , S Schmidt-Kaerst , D Schmitz , M Schneegans , 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 , V Soulimov , B Smith , P Spillantini , M Steuer , DP Stickland , H Stone , B Stoyanov , A Straessner , K Sudhakar , G Sultanov , LZ Sun , GF Susinno , H Suter , JD Swain , XW Tang , L Tauscher , L Taylor , SCC Ting , SM Ting , SC Tonwar , J Toth , C Tully , H Tuchscherer , KL Tung , Y Uchida , J Ulbricht , U Uwer , E Valente , G Vesztergombi , I Vetlitsky , G Viertel , M Vivargent , S Vlachos , R Volkert , H Vogel , H Vogt , I Vorobiev , AA Vorobyov , A Vorvolakos , M Wadhwa , W Wallraff , JC Wang , XL Wang , ZM Wang , A Weber , SX Wu , S Wynhoff , J Xu , ZZ Xu , BZ Yang , CG Yang , XY Yao , JB Ye , SC Yeh , JM You , A Zalite , Y Zalite , P Zemp , Y Zeng , Z Zhang , ZP Zhang , B Zhou , Y Zhou , GY Zhu , RY Zhu , A Zichichi , F Ziegler EUROPEAN PHYSICAL JOURNAL C（1998）
摘要
Time-dependent B-0-(B) over bar(0) mixing is studied using about two million hadronic Z decays registered by L3 in 1994 and 1995. For this study three techniques are used. Tagging of the b-quark charge at decay time is performed by identifying leptons from semileptonic B decays. The flavour of the b quark at production time is determined from the charge of the lepton in the opposite hemisphere or by using a jet-charge technique. The proper time of the B-particle decay is obtained by reconstructing the production and decay vertices or by a measurement of the lepton impact parameter. The combined result for the frequency of B-d(0) meson oscillations is Delta m(d) = 0.444 +/- 0.040 ps(-1).
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