Blessed Figures

The following figures have been blessed for the measurement of the $B^-$ and $\bar{B}^0$ meson lifetimes using semileptonic decays. More text can be found in CDF note 7458.

Figure 1: $D^0$ mass plot for the lepton+ $D^0\ (D^{*+} \mbox{excluded})$ sample (left) and plot of mass difference $M(D^0\pi _s^+)-M(D^0)$ for the lepton+$D^{*+}$ sample (right). In the $D^0$ mass plot, the histogram show events which have wrong charge correlation between lepton and kaon. In the $\Delta M$ plot, histogram for events whose $\pi _s$ track have wrong charge ($\pi _s^-$ with $D^0$) is also shown.

Figure: A schematic view of the typical semileptonic decay $B^- \rightarrow \ell^- \bar{\nu}D^0$, $D^0\rightarrow K^-\pi ^+$ in $xy$ plane.

Figure 3: The pseudo-proper decay length distributions for the lepton+$D^0$ ($D^{*+}$ excluded) and the lepton+$D^{*+}$ samples. Lifetime fit results are overlaid.