@article{dbb84087a4324ab480bbe30fc69ec2ed,
title = "Measurement of the time dependence of B0d↔B0d mixing using a jet charge technique",
abstract = "The observation and measurement of the time-dependence of B0d↔B0d mixing are described. The B0d meson is reconstructed in final states that contain a D*- and an ℓ+, where the b flavour of the B0d at decay time is tagged by the electric charge of the lepton. A new and efficient method, using a jet charge technique, is developed for identifying the b flavour of the produced B0d. From a sample of 556 D*±ℓ∓ candidates reconstructed in the OPAL data collected during 1990-1993, the B0d↔B0d oscillation frequency is measured to be Δmd = 0.508 ± 0.075 (stat) ±0.025(syst) ps-1 giving an oscillation parameter of χd = 0.73 ± 0.11 (stat) ±0.08 (syst), where 0.076 of the systematic error on χd arises from the uncertainty on the B0d lifetime.",
author = "{The OPAL Collaboration} and R. Akers and G. Alexander and J. Allison and Anderson, {K. J.} and S. Arcelli and S. Asai and A. Astbury and D. Axen and G. Azuelos and Ball, {A. H.} and Barlow, {R. J.} and S. Barnett and R. Bartoldus and Batley, {J. R.} and G. Beaudoin and A. Beck and Beck, {G. A.} and J. Becker and C. Beeston and T. Behnke and Bell, {K. W.} and G. Bella and P. Bentkowski and P. Berlich and S. Bethke and O. Biebel and Bloodworth, {I. J.} and P. Bock and B. Boden and Bosch, {H. M.} and M. Boutemeur and P. Bright-Thomas and Brown, {R. M.} and A. Buijs and Burckhart, {H. J.} and C. Burgard and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and C. Charlesworth and Charlton, {D. G.} and Chu, {S. L.} and Clarke, {P. E.L.} and Clayton, {J. C.} and I. Cohen and Conboy, {J. E.} and M. Cooper and R. Folman",
note = "Funding Information: It is a pleasureto thankt he SL Division for the efficienot peratioonf theL EP acceleratotrh, eprecise informatioonn the absolutee nergya, ndt heirc ontin-uing closec ooperatiowni th our experimentgarl oup. In additionto the supporst taffa t our own institutions we arep leasedto acknowledgteh e Departmenotf EnergyU, SA, NationaSl cienceF oundationU,S A, Texas National ResearchL aboratoryC ommission, USA, Sciencea ndE ngineerinRge searchC ouncil,U K, NaturalS ciencesa ndE ngineerinRge searchC ouncil, Canada, FussefeldFo undation, IsraeliM inistryo f Energya ndM inistryo f Science, MinervaG esellschaft, JapaneseM inistryo f EducationS, ciencea ndCulture (the Monbusho)a nd a grant under the Monbusho InternationaSlc ienceR esearchP rogram, German Israeli Bi-national Science Foundation (GIF), Directiond esS cienceds ela Mati&ed u Commissariat l'EnergieA tomiqueF, rance, Bundesministeriufimir Forschungu nd Technologic, Germany, NationaRl esearchC ouncilo f Canada, A.P. Sloan Foundationa nd Junta Nacional de InvestigaqCoie nffficae Tecnol6gicaP,o rtugal.",
year = "1994",
month = may,
day = "19",
doi = "10.1016/0370-2693(94)90747-1",
language = "English",
volume = "327",
pages = "411--424",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier",
number = "3-4",
}