The prospects for the measurement of $B_{ s}^{ 0}$ oscillations with the ATLAS detector at the Large Hadron Collider are presented. $B_{ s}^{ 0}$ candidates in the $D_{ s}^{ -} \pi^{ +}$ and $D_{ s}^{ -} a_{ 1}^{ +}$ decay modes from semileptonic events were fully simulated and reconstructed, using a detailed detector description. The sensitivity and the expected accuracy for the measurement of the oscillation frequency were derived from unbinned maximum likelihood amplitude fits as functions of the integrated luminosity. A detailed treatment of the systematic uncertainties was performed. The dependence of the measurement sensitivity on various parameters was also evaluated.
Categories: hep-ph