Measurement of the $B^0-{\bar{B}}^0$ mixing rate with $B^0({\bar{B}}^0)\to D^{\ast \mp }{\pi }^{\pm }$ partial reconstruction

Y. Zheng, T. E. Browder

We report a measurement of the $B^0-{\bar{B}}^0$ mixing parameter $\Delta m_d$ based on a $29.1\mathrm{f}{\mathrm{b}}^{-1}$ sample of ${\rm Y}(4S)$ resonance decays collected by the Belle detector at the KEKB…