Measurement of B-B mixing at the Z using a jet-charge method

D Buskulic; D Decamp; C Goy; JP Lees; MN Minard; B Mours; R Alemany; F Ariztizabal; P Comas; JM Crespo; M Delfino; E Fernandez; V Gaitan; L Garrido; LM Mir; A Pacheco; A Pascual; D Creanza; M de Palma; A Farilla; G Iaselli; G Maggi; M Maggi; S Natali; S Nuzzo; M Quattromini; A Ranieri; G Raso; F Romano; F Ruggieri; G Selvaggi; L Silvestris; P Tempesta; G Zito; Y Gao; H Hu; D Huang; X Huang; J Lin; J Lou; C Qiao; T Wang; Y Xie; D Xu; R Xu; J Zhang; W Zhao; WB Atwood; LAT Bauerdick; E Blucher; G Bonvicini; F Bossi; J Boudreau; TH Burnett; H Drevermann; RW Forty; R Hagelberg; S Haywood; J Hilgart; R Jacobsen; B Jost; J Knobloch; E Lançon; I Lehraus; T Lohse; A Lusiani; M Martinez; P Mato; T Mattison; H Meinhard; S Menary; T Meyer; A Minten; A Miotto; R Miquel; HG Moser; J Nash; P Palazzi; JA Perlas; F Ranjard; G Redlinger; L Rolandi; A Roth; J Rothberg; T Ruan; M Saich; D Schlatter; M Schmelling; F Sefkow; W Tejessy; H Wachsmuth; W Wiedenmann; T Wildish; W Witzeling; J Wotschack; Z Ajaltouni; F Badaud; M Bardadin-Otwinowska; AM Bencheikh; R El Fellous

Journal article

Measurement of B-B mixing at the Z using a jet-charge method

D Buskulic, D Decamp, C Goy, JP Lees, MN Minard, B Mours, R Alemany, F Ariztizabal, P Comas, JM Crespo, M Delfino, E Fernandez, V Gaitan, L Garrido, LM Mir, A Pacheco, A Pascual, D Creanza, M de Palma, A Farilla Show all

Physics Letters B | ELSEVIER SCIENCE BV | Published : 1992

DOI: 10.1016/0370-2693(92)91943-4

Abstract

Results on B0-B0 mixing in e+e- annihilation at LEP are reported. A new method is used, where the charge of one b quark is tagged by a high-p, high-p⊥ electron or muon, and the charge of the other is extracted from the momentum-weighted average of the charges of jet fragments. Based on the analysis of 180 000 hadronic Z decays produced in the ALEPH detector, {cauchy integral}dχd+0.72{cauchy integral}sχs=0.113±0.018(stat.)± 0.027(syst.) is obtained. Combining this result with the ALEPH dipleton measurement yields χ=0.129±0.022. © 1992.