Phys. Rev. Lett. 58, 183–186 (1987)Limits on B0B¯0 mixing and &Received 24 July 1986; published in the issue dated 19 January 1987 Limits are set on B0B¯0 mixing by use of dilepton events from Υ(4S) decay. On the assumption that the charged- and neutral-B semileptonic branching ratios are equal and that 41% of the B mesons from the Υ(4S) are neutral, a 90%-confidence-level upper limit of 24% is set on B0B¯0 mixing. Limits are also given for the ratio of the lifetimes of neutral and charged B mesons. The 90%-confidence-level limits are &<2.05. © 1987 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.58.183
DOI:
10.1103/PhysRevLett.58.183
PACS:
14.40.Jz, 13.20.Jf, 13.65.+i
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