Measurement of the B0bar Lifetime and the B0B0bar Oscillation Frequency Using Partially Reconstructed B0bar --> D*+ ell- nu-bar Decays
Abstract
We present a simultaneous measurement of the B0bar lifetime tauB0 and B0B0bar oscillation frequency Deltamd. We use a sample of about 50000 partially reconstructed B0bar --> D*+ ell- nu-bar decays identified with the BABAR detector at the PEP-II e+e- storage ring at SLAC. The flavor of the other B meson in the event is determined from the charge of another high-momentum lepton. The results are tauB0 = (1.504 +/- 0.013 (stat) +0.018/-0.013 (syst)) ps, Deltamd = (0.511 +/- 0.007 (stat) +0.007/-0.006 (syst)) ps-1
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