Measurement of the lifetime of the Bc meson in the semileptonic decay channel
Abstract
Using approximately 1.3 fb-1 of data collected by the D0 detector between 2002 and 2006, we measure the lifetime of the Bc meson in the Bc -> J/psi mu nu X final state. A simultaneous unbinned likelihood fit to the J/+mu invariant mass and lifetime distributions yields a signal of 881 +/- 80 (stat) candidates and a lifetime measurement of τ(Bc) = 0.448 +0.038 -0.036 (stat) +/- 0.032 (syst) ps.
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