\label{fig:veronica}Sensitivity of the W mass measurement to the mass \(m_{\tilde{t}_{1}}\) of the lighter supersymmetric partner of the top quark (horizontal axis) as a function of the difference \(\delta m\) between the masses of the two stop squarks (vertical axis), from the analysis of Ref. \cite{1207.7355}. The colours indicate that measurements of the W mass with a precision smaller than 5 MeV (blue), 1 MeV (red) and 500 keV (green) would be sensitive to a stop mass of 850 GeV, 1.9 TeV and 2.6 TeV, respectively, independently of the stop decay modes.