Measurement of the $B^{0} - {\bar{B}}^{0}$ Oscillation Frequency with Inclusive Dilepton Events

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20 May 2002

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 88 (22) , 221803
https://doi.org/10.1103/physrevlett.88.221803

Abstract

The

B^{0} - {\bar{B}}^{0}

oscillation frequency has been measured with a sample of

23 \times 10^{6} B \bar{B}

pairs collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we select events in which both

B

mesons decay semileptonically and use the charge of the leptons to identify the flavor of each

B

meson. A simultaneous fit to the decay time difference distributions for opposite- and same-sign dilepton events gives

Δ m_{d} = 0.493 \pm 0.012 (stat) \pm 0.009 (syst) {ps}^{- 1}

.

Keywords

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Version 1, 2001-12-31, ArXiv

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