D^0-$\bar D^0$ Mixing and CP Violation from FOCUS Experiment

Details D^0-$\bar D^0$ Mixing and CP Violation from FOCUS Experiment D^0-$\bar D^0$ Mixing and CP Violation from FOCUS Experiment

2000-11-16

arxiv.org/abs/hep-ex/0011051v3

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 2 figures, contributed to the XXX International Conference on High Energy Physics (ICHEP 2000), Osaka, Japan, 27 July

Scientific paper

Measurement results on $D^0$-$\bar D^0$ mixing and CP violation are presented. FOCUS, a fixed target experiment at Fermilab, collected a high statistics photo-produced charm sample collected during the 96-97 run. We reconstructed more than 1 million charmed particles and compared the lifetimes of two $D^0$ meson decays to $K^-\pi^+$ and $K^-K^+$. The mixing parameter, $y_{\rm cp}$, we obtained is $(3.42\pm 1.39\pm 0.74)%$. We also searched CP asymmetries in $D^+\to K^-K^+\pi^+$, $D^0\to K^-K^+$ and $D^0\to \pi^-\pi^+$ decay modes. We did not see any evidence of CP violation by comparing the decay rates for particle and antiparticle.

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