Search for B-s(0)-(B-s(0))over-bar oscillations in DELPHI using high-p(t) leptons

Summary, in English

Oscillations in the B-s(0)- <(B-s(0))over bar> system were studied in events selected from about 4.3 million hadronic Z(0) decays registered by DELPHI between 1992 and 2000. This paper presents updates of two published analyses ([11, 12]). The first analysis, which utilizes leptons emitted with large momentum transverse to a jet, was improved by means of a better algorithm for the vertex reconstuction and a new algorithm for flavour-tagging at production time. The second analysis, which utilizes D-s-lepton events, was improved by optimizing the treatment of proper time resolution. No signal of B-s(0) oscillations was observed and limits on the mass difference between the physical B-s(0) states were obtained to be: Deltam(s)>8.0 ps-1 at the 95% C.L. with a sensitivity of Deltam(s)= 9.1 ps(-1) in the high p(t) lepton analysis and Deltam(s)>4.9 ps(-1) at the 95% C.L. with a sensitivity of Deltam(s)=8.6 ps(-1) in the D-s-lepton analysis. Previously published results on these analyses are superseded. The combination of these results with those obtained in other independent analyses previously performed in DELPHI (D-s-hadron, exclusive B-s(0), inclusive vertex) gives: Deltam(s)>8.5 ps(-1) at the 95% C.L. with a sensitivity of Deltam(s)=12.0 ps(-1).

• Author: J Abdallah; P Abreu; W Adam; P Adzic; T Albrecht; T Alderweireld; R Alemany-Fernandez; T Allmendinger; P Allport; U Amaldi; N Amapane; S Amato; E Anashkin; A Andreazza; S Andringa; N Anjos; P Antilogus; WD Apel; Y Arnoud; Stefan Ask; B Asman; E 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; L Booth; G Borisov; O Botner; B Bouquet; V Bowcock; I Boyko; M Bracko; R Brenner; E Brodet; P Bruckman; M 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; U Chung; K Cieslik; P Collins; R Contri; G Cosme; F Cossutti; J Costa; 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; CE Santo; 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; R Gokieli; B Golob; G Gomez-Ceballos; P Goncalves; E Graziani; G Grosdidier; K Grzelak; J Guy; C Haag; A Hallgren; K Hamacher; K Hamilton; S Haug; F Hauler; Vincent Hedberg; M Hennecke; H Herr; J Hoffman; SO Holmgren; J Holt; A Houlden; K Hultqvist; N Jackson; Göran Jarlskog; P Jarry; D Jeans; K Johansson; D Johansson; P Jonsson; C Joram; L Jungermann; F Kapusta; S Katsanevas; E Katsoufis; G Kernel; P Kersevan; U Kerzel; A Kiiskinen; T King; J 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; H Lopes; M 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; E Migliore; W Mitaroff; Ulf Mjörnmark; 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; P Palacios; H Palka; D 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; E 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; 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; Oxana 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; C Taffard; F Tegenfeldt; J Timmermans; L Tkatchev; M Tobin; S Todorovova; B Tome; A Tonazzo; P Tortosa; P Travnicek; D Treille; G Tristram; M Trochimczuk; C Troncon; ML Turluer; A 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; P Verdier; V Verzi; D Vilanova; L Vitale; V Vrba; H Wahlen; J Washbrook; C Weiser; D Wicke; J Wickens; G Wilkinson; M Winter; M Witek; O Yushchenko; A Zalewska; P Zalewski; D Zavrtanik; V Zhuravlov; I Zimin; A Zintchenko; M Zupan
• Department/s: Particle and nuclear physics
• Publishing year: 2004
• Language: English
• Pages: 35-52
• Publication/Series: European Physical Journal C. Particles and Fields
• Volume: 35
• Issue: 1
• Links: http://dx.doi.org/10.1140/epjc/s2004-01827-0
• Document type: Journal article
• Publisher: Springer
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 1434-6044