We have measured the B0B¯0 mixing probability, χd, using a sample of 965 000 BB¯ pairs from Υ(4S) decays. Counting dilepton events, we find χd=0.157±0.016±0.018+0.028−0.021. Using tagged B0 events, we find χd=0.149±0.023±0.019±0.010. The first (second) error is statistical (systematic). The third error reflects a ±15% uncertainty in the assumption, made in both cases, that charged and neutral B pairs contribute equally to dilepton events. We also obtain a limit on the CP impurity in the B0d system, ‖Re(ε0B)‖<0.045 at 90% C.L.
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Physical Review Letters
American Physical Society
J., Bartelt and THULASIDAS, Manoj.
Two measurements of B0 B-0 mixing. (1993). Physical Review Letters. 71, (11), 1680-1684. Research Collection School Of Information Systems.
Available at: http://ink.library.smu.edu.sg/sis_research/3669
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