@article{a7b86a57941e4f18aba2d2766b5cb23a,
title = "Measurement of B0B0 mixing in hadronic Z0 decays. OPAL collaboration",
abstract = "From a sample of approximately 135 000 hadronic Z0 decays recorded with the OPAL detector, 1 536 events were selected with two lepton candidates, either electrons or muons. A signal for B0B0 mixing was observed using the sign of the lepton charge to tag the charge of the b quark in decaying b-flavoured hadrons. A flavour discriminating variable was constructed from the lepton momentum and its component perpendicular to the jet axis. By fitting the fraction of events in which the two lepton charges are of the same sign, as a function of this variable, the average mixing parameter was measured to be χ = 0.145+0.041 -0.035 ± 0.018, where the first error is statistical and the second is systematic.",
author = "{OPAL Collaboration} and Acton, {P. D.} and G. Alexander and J. Allison and Allport, {P. P.} and Anderson, {K. J.} and S. Arcelli and P. Ashton and A. Astbury and D. Axen and G. Azuelos and Bahan, {G. A.} and Baines, {J. T.M.} and Ball, {A. H.} and J. Banks and Barker, {G. J.} and Barlow, {R. J.} and Batley, {J. R.} and G. Beaudoin and A. Beck and J. Becker and T. Behnke and Bell, {K. W.} and G. Bella and P. Berlich and S. Bethke and O. Biebel and U. Binder and Bloodworth, {I. J.} and P. Bock and B. Boden and Bosch, {H. M.} and S. Bougerolle and Brabson, {B. B.} and H. Breuker and Brown, {R. M.} and R. Brun and A. Buijs and Burckhart, {H. J.} and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and Charlton, {D. G.} and Clarke, {P. E.L.} and I. Cohen and Collins, {W. J.} and Conboy, {J. E.} and M. Cooper and E. Etzion",
note = "Funding Information: It is a pleasure to thank the SL Division for the efficient operation of the LEP accelerator and their continuing close cooperation with our experimental group. In addition to the support staff at our own institutions we are pleased to acknowledge the Department of Energy, USA, National Science Foundation, USA, Science and Engineering Research Council, UK, Natural Sciences and Engineering Research Council, Canada, Israeli Ministry of Science, Minerva Gesellschaft, Japanese Ministry of Education, Science and Culture (the Monbusho) and a grant under the Monbusho International Science Research Program, American Israeli Bi-national Science Foundation, Direction des Sciences de la Matibre du Commissariat & l'Energie Atomique, France, Bundesministerium t'fir Forschung und Technologie, FRG, A.P. Sloan Foundation and Junta Nacional de Inves-tigac~o Cientifica e Tecnol6gica, Portugal.",
year = "1992",
month = feb,
day = "13",
doi = "10.1016/0370-2693(92)90335-2",
language = "אנגלית",
volume = "276",
pages = "379--392",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier",
number = "3",
}