Precision measurement of the $B_{s}$ lifetime using the channel $B^{0}_s\rightarrow D_s^{+}\mu X$

We report a measurement of the lifetime of the $B^{0}_{s}$ meson, using the semileptonic channel $B^{0}_s\rightarrow D^{+}_s\mu X$. We use 8.9 fb$^{-1}$ of data collected by the D$\O{}$ experiment. This is the most precise measurement of $B^{0}_{s}$ lifetime reported to date.