Limits on D0-D0bar Mixing and CP Violation from the Ratio of Lifetimes for Decay to K-pi+, K-K+, and pi-pi+

Abstract

We present a measurement of $D^0$-$\D0bar$ mixing parameters using the ratios of lifetimes extracted from samples of $D^0$ mesons decaying to $K^{-}{\pi }^{+}$, $K^{-}{K}^{+}$, and ${\pi }^{-}{\pi }^{+}$. Using 91 ${\mathrm{fb}}^{-1}$ of data collected by the BaBar detector at the PEP-II asymmetric-energy $B$ Factory, we obtain a value $Y=(0.8\pm 0.4(stat.){}_{-0.4}^{+0.5}(syst.))$%, which, in the limit of CP conservation, corresponds to the mixing parameter $y=\Delta \Gamma /2\Gamma$. Using the difference in lifetimes of $D^0$ and $\D0bar$ mesons, we obtain the CP-violation parameter $\Delta Y=(-0.8\pm 0.6(stat.)\pm 0.2(syst.))$%.

7 pages, 2 postscript figues, submitted to Phys.Rev.Lett

References in corpus (1)

• Mixing in the D0 system - Results from collider experiments

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