Measurement of $y_{CP}$ in $D^0$ meson decays to the $K_S^0K^+K^-$ final state

Details Measurement of $y_{CP}$ in $D^0$ meson decays to the $K_S^0K^+K^-$ final state Measurement of $y_{CP}$ in $D^0$ meson decays to the $K_S^0K^+K^-$ final state

2009-05-26

arxiv.org/abs/0905.4185v1

Phys.Rev.D80:052006,2009

Physics

High Energy Physics

High Energy Physics - Experiment

18 pages, 6 figures, 4 tables

Scientific paper

10.1103/PhysRevD.80.052006

We present a measurement of the $D^0$-$\overline{D}{}^0$ mixing parameter $y_{CP}$ using a flavor-untagged sample of $D^0\to K_S^0K^+K^-$ decays. The measurement is based on a 673 fb$^{-1}$ data sample recorded with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. Using a method based on measuring the mean decay time for different $K^+K^-$ invariant mass intervals, we find $y_{CP} = (+0.11\pm 0.61 ({\rm stat.})\pm 0.52 (\rm syst.))%$.

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