Search For B-S(0)-(B-S(0))Over-Bar Oscillations And A Measurement Of B-D(0)-(B-D(0))Over-Bar Oscillations Using Events With An Inclusively Reconstructed Vertex

J Abdallah,P Abreu,W Adam,P Adzic,T Albrecht,T Alderweireld,R Alemany-Fernandez,T Allmendinger,Pp Allport,U Amaldi,N Amapane,S Amato,E Anashkin,A Andreazza,S Andringa,N Anjos,P Antilogus,Wd Apel,Y Arnoud,S Ask,B Asman,Je Augustin,A Augustinus,P Baillon,A Ballestrero,P Bambade,R Barbier,D Bardin,G Barker,A Baroncelli,M Battaglia,M Baubillier,Kh Becks,M Begalli,A Behrmann,E Ben-Haim,N Benekos,A Benvenuti,C Berat,M Berggren,L Berntzon,D Bertrand,M Besancon,N Besson,D Bloch,M Blom,M Bluj,M Bonesini,M Boonekamp,Psl Booth,G Borisov,O Botner,B Bouquet,Tjv Bowcock,I Boyko,M Bracko,R Brenner,E Brodet,P Bruckman,Jm Brunet,L Bugge,P Buschmann,M Calvi,T Camporesi,V Canale,F Carena,N Castro,F Cavallo,M Chapkin,P Charpentier,P Checchia,R Chierici,P Chliapnikov,J Chudoba,Su Chung,K Cieslik,P Collins,R Contri,G Cosme,F Cossutti,Mj Costa,B Crawley,D Crennell,J Cuevas,J D'Hondt,J Dalmau,T Da Silva,W Da Silva,G Della Ricca,A De Angelis,W De Boer,C De Clercq,B De Lotto,N De Maria,A De Min,L De Paula,L Di Ciaccio,A Di Simone,K Doroba,J Drees,M Dris,G Eigen,T Ekelof,M Ellert,M Elsing, Mce Santos,G Fanourakis,D Fassouliotis,M Feindt,J Fernandez,A Ferrer,F Ferro,U Flagmeyer,H Foeth,E Fokitis,F Fulda-Quenzer,J Fuster,M Gandelman,C Garcia,P Gavillet,E Gazis,T Geralis,R Gokieli,B Golob, Gg Ceballos,P Goncalves,E Graziani,G Grosdidier,K Grzelak,J Guy,C Haag,A Hallgren,K Hamacher,K Hamilton,J Hansen,S Haug,F Hauler,V Hedberg,M Hennecke,H Herr,J Hoffman,So Holmgren,Pj Holt,Ma Houlden,K Hultqvist,Jn Jackson,G Jarlskog,P Jarry,D Jeans,Ek Johansson, Pd Johansson,P Jonsson,C Joram,L Jungermann,F Kapusta,S Katsanevas,E Katsoufis,G Kernel,Bp Kersevan,A Kiiskinen,Bt King,Nj Kjaer,P Kluit,P Kokkinias,C Kourkoumelis,O Kouznetsov,Z Krumstein,M Kucharczyk,J Lamsa,G Leder,F Ledroit,L Leinonen,R Leitner,J Lemonne,V Lepeltier,T Lesiak,W Liebig,D Liko,A Lipniacka,Jh Lopes,Jm Lopez,D Loukas,P Lutz,L Lyons,J Macnaughton,A Malek,S Maltezos,F Mandl,J Marco,R Marco,B Marechal,M Margoni,Jc Marin,C Mariotti,A Markou,C Martinez-Rivero,J Masik,N Mastroyiannopoulos,F Matorras,C Matteuzzi,F Mazzucato,M Mazzucato,R Mc Nulty,C Meroni,Wt Meyer,E Migliore,W Mitaroff,U Mjoernmark,T Moa,M Moch,K Moenig,R Monge,J Montenegro,D Moraes,S Moreno,P Morettini,U Mueller,K Muenich,M Mulders,L Mundim,W Murray,B Muryn,G Myatt,T Myklebust,M Nassiakou,F Navarria,K Nawrocki,R Nicolaidou,M Nikolenko,A Oblakowska-Mucha,V Obraztsov,A Olshevski,A Onofre,R Orava,K Osterberg,A Ouraou,A Oyanguren,M Paganoni,S Paiano, Jp Palacios,H Palka,Td Papadopoulou,L Pape,C Parkes,F Parodi,U Parzefall,A Passeri,O Passon,L Peralta,V Perepelitsa,A Perrotta,A Petrolini,J Piedra,L Pieri,F Pierre,M Pimenta,E Piotto,T Podobnik,V Poireau,Me Pol,G Polok,P Poropat,V Pozdniakov,N Pukhaeva,A Pullia,J Rames,L Ramler,A Read,P Rebecchi,J Rehn,D Reid,R Reinhardt,P Renton,F Richard,J Ridky,M Rivero,D Rodriguez,A Romero,P Ronchese,E Rosenberg,P Roudeau,T Rovelli,V Ruhlmann-Kleider,D Ryabtchikov,A Sadovsky,L Salmi,J Salt,A Savoy-Navarro,U Schwickerath,A Segar,R Sekulin,M Siebel,A Sisakian,G Smadja,O Smirnova,A Sokolov,A Sopczak,R Sosnowski,T Spassov,M Stanitzki,A Stocchi,J Strauss,B Stugu,M Szczekowski,M Szeptycka,T Szumlak,T Tabarelli, Ac Taffard,F Tegenfeldt,J Timmermans,L Tkatchev,M Tobin,S Todorovova,A Tomaradze,B Tome,A Tonazzo,P Tortosa,P Travnicek,D Treille,G Tristram,M Trochimczuk,C Troncon,Ml Turluer,Ia Tyapkin,P Tyapkin,S Tzamarias,V Uvarov,G Valenti,P Van Dam,J Van Eldik,A Van Lysebetten,N Van Remortel,I Van Vulpen,G Vegni,F Veloso,W Venus,F Verbeure,P Verdier,V Verzi,D Vilanova,L Vitale,V Vrba,H Wahlen,Aj Washbrook,C Weiser,D Wicke,J Wickens,G Wilkinson,M Winter,M Witek,O Yushchenko,A Zalewska,P Zalewski,D Zavrtanik,Ni Zimin,A Zintchenko,M Zupan

EUROPEAN PHYSICAL JOURNAL C（2003）

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Abstract

Neutral B meson oscillations in the B-s(0) - <(B-s(0))over bar>, and B-d(0) - <(B-d(0))over bar> systems were studied using a sample of about 4.0 million hadronic Z decays recorded by the DELPHI detector between 1992 and 2000. Events with a high transverse momentum lepton were removed and a sample of 770 k events with an inclusively reconstructed vertex was selected.The mass difference between the two physical states in the B-d(0) - <(B-d(0))over bar>system was measured to be: Deltam(d) = (0.531 +/- 0.025(stat.) +/- 0.007(syst.))ps(-1).The following limit on the width difference of these states was also obtained:\DeltaGamma(Bd)\/Gamma(Bd) < 0.18 at 95% CL.As no evidence for B-s(0) -<(B-s(0))over bar> oscillations was found, a limit on the mass difference of the two physical states was given:,Deltam(s) > 5.0 ps(-1) at 95% CL.The corresponding sensitivity of this analysis is equal to 6.6 ps(-1).

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Key words

Resonance

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