Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2002-11-18
Physics
High Energy Physics
High Energy Physics - Experiment
5 pages, 2 encapsulated postscript figures, contributed to the proceedings of ICHEP2002
Scientific paper
10.1016/S0920-5632(03)90598-6
The $B^0\bar{B^0}$ oscillation frequency $\Delta m_d$ has been measured with the BaBar detector at the PEP-II asymmetric $B$ factory with different experimental techniques. The discussion here is focused on the recent simultaneous measurement of $\Delta m_d$ and $\tau_{B^0}$ with exclusively reconstructed $B^0 \to D^{*-}l^+\nu_l$ decays, based on 23 million $B\bar{B}$ pairs collected by BaBar. The measurements of $\Delta m_d$ with fully reconstructed hadronic decays and with dilepton events are also reviewed. The average BaBar result is $\Delta m_d = 0.500 \pm 0.008 \pm 0.006$ $ps^{-1}$.
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