${\sin }^2{\theta }_{\mathrm{e}\mathrm{f}\mathrm{f}}^{\mathrm{l}\mathrm{e}\mathrm{p}\mathrm{t}}$ and $M_W$(indirect) extracted from 9 fb${}^{-1}$ ${\mu }^{+}{\mu }^{-}$ event sample at CDF

We report on the extraction of ${\sin }^2{\theta }_{\mathrm{e}\mathrm{f}\mathrm{f}}^{\mathrm{l}\mathrm{e}\mathrm{p}\mathrm{t}}$ and indirect measurement of the mass of the W boson from the forward-backward asymmetry of ${\mu }^{+}{\mu }^{-}$ events in the $Z$ boson mass region. The data sample collected by the CDF detector corresponds to the full 9 fb${}^{-1}$ run II sample. We measure ${\sin }^2{\theta }_{\mathrm{e}\mathrm{f}\mathrm{f}}^{\mathrm{l}\mathrm{e}\mathrm{p}\mathrm{t}}=0.2315\pm 0.0010$, ${\sin }^2{\theta }_W=0.2233\pm 0.0009$ and $M_W ({\rm indirect}) = 80.365 \pm 0.047 ;{\rm GeV}/c^2$, where each uncertainty includes both statistical and systematic contributions. Comparison with the results of the D0 collaboration are presented.