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Precise Measurement of B0 B0 Mixing Parameters at the Υ(S)$

B. H. Behrens, CLEO Collaboration

hep-exarXiv:hep-ex/0005013

Abstract

We describe a measurement of B0-B0bar mixing parameters exploiting a method of partial reconstruction of the decay chains B0 -> D*-π+ and B0 -> D*-ρ+. Using 9.6 x 106 BBbar pairs collected at the Cornell Electron Storage Ring, we find χd = 0.198 +- 0.013 +- 0.014, |yd|<0.41 at 95% confidence level, and |Re(εB)|<0.034 at 95% confidence level.

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