Measurement of $y_{CP}$ in $D$ meson decays to CP eigenstates

Abstract

We present a measurement of the $D^0$-${\overline{D}}^0$ mixing parameter $y_{CP}$ using a flavor-untagged sample of $D^0\to K_S^0{K}^{+}{K}^{-}$ decays. The measurement is based on a 673 fb${}^{-1}$ data sample recorded by the Belle detector at the KEKB asymmetric-energy $e^{+}{e}^{-}$ collider. We find $y_{CP}=(0.21\pm 0.63(stat.)\pm 0.78(syst.)\pm 0.01(\mathrm{model}))$.

12 pages, 4 figures, Contributed to the 34th International Conference on High Energy Physics, Philadelphia, USA, July 2008