Measurement of B0B»0 mixing at the Fermilab Tevatron Collider

F. Abe, D. Amidei, G. Apollinari, M. Atac, P. Auchincloss, A. R. Baden, N. Bacchetta, M. W. Bailey, A. Bamberger, B. A. Barnett, A. Barbaro-Galtieri, V. E. Barnes, T. Baumann, F. Bedeschi, S. Behrends, S. Belforte, G. Bellettini, J. Bellinger, J. Bensinger, A. BeretvasJ. P. Berge, S. Bertolucci, S. Bhadra, M. Binkley, R. Blair, C. Blocker, V. Bolognesi, A. W. Booth, C. Boswell, G. Brandenburg, D. Brown, E. Buckley-Geer, H. S. Budd, G. Busetto, A. Byon-Wagner, K. L. Byrum, C. Campagnari, M. Campbell, R. Carey, W. Carithers, D. Carlsmith, J. T. Carroll, R. Cashmore, A. Castro, F. Cervelli, K. Chadwick, G. Chiarelli, W. Chinowsky, S. Cihangir, A. G. Clark, D. Connor, M. Contreras, J. Cooper, M. Cordelli, D. Crane, M. Curatolo, C. Day, F. Dejongh, S. Delleagnello, M. Delleorso, L. Demortier, B. Denby, P. F. Derwent, T. Devlin, D. Dibitonto, R. B. Drucker, J. E. Elias, R. Ely, S. Eno, S. Errede, B. Esposito, B. Flaugher, G. W. Foster, M. Franklin, J. Freeman, H. Frisch, T. Fuess, Y. Fukui, Y. Funayama, A. F. Garfinkel, A. Gauthier, S. Geer, D. W. Gerdes, P. Giannetti, N. Giokaris, P. Giromini, L. Gladney, M. Gold, K. Goulianos, H. Grassmann, C. Grosso-Pilcher, C. Haber, S. R. Hahn, R. Handler, K. Hara, R. M. Harris, J. Hauser, C. Hawk, T. Hessing, R. Hollebeek

Research output: Contribution to journalArticlepeer-review


The B0 B» 0 average mixing parameter has been extracted from e and ee events produced in pp» collisions at s =1.8 TeV. In a sample of 900 e events, the like-sign to opposite-sign charge ratio R is measured to be 0.556+0.048(stat)-0.042+0.035(syst). In the absence of mixing, the expected value of R would be 0.23+0.06. The corresponding number for 212 ee events is 0.573+0.116(stat)+0.047(syst) with an expected nonmixing value of 0.24+0.07. The observed excess in R leads to a combined determination of =0.176+0.031(stat+syst) +0.032 (model), where the last uncertainty is due to Monte Carlo modeling.

Original languageEnglish (US)
Pages (from-to)3351-3355
Number of pages5
JournalPhysical review letters
Issue number24
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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