Abstract
We have measured the B mixing probability, , using a sample of 965 000 BB¯ pairs from Υ(4S) decays. Counting dilepton events, we find =0.157±0.016±0.. Using tagged events, we find =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 system, ‖Re()‖<0.045 at 90% C.L.
- Received 29 April 1993
DOI:https://doi.org/10.1103/PhysRevLett.71.1680
©1993 American Physical Society