Two measurements of B0B¯0 mixing

J. Bartelt et al.
Phys. Rev. Lett. 71, 1680 – Published 13 September 1993
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Abstract

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±0.0180.021+0.028. 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 Bd0 system, ‖Re(εB0)‖<0.045 at 90% C.L.

  • Received 29 April 1993

DOI:https://doi.org/10.1103/PhysRevLett.71.1680

©1993 American Physical Society

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Vol. 71, Iss. 11 — 13 September 1993

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