Reconstruction of stop quark mass at the LHC

The cascade mass reconstruction approach was applied to simulated production of the lightest stop quark at the LHC in the cascade decay $\tilde{g} \to \sTop , \Top \to \tilde{\chi}{2}^{0} , \Top , \Top \to \tilde{\ell}{R} , \ell , \Top , \Top \to \tilde{\chi}_{1}^{0} , \ell , \ell , \Top , \Top$ with top quarks decaying into hadrons. The stop quark mass was reconstructed assuming that the masses of gluino, slepton and of the two lightest neutralinos were reconstructed in advance. A data sample set for the SU3 model point containing 400k SUSY events was generated which corresponded to an integrated luminosity of about 20 $\rm fb^{-1}$ at 14 TeV. These events were passed through the AcerDET detector simulator, which parametrized the response of a generic LHC detector. The mass of the ${\tilde{t}}_1$ was reconstructed with a precision of about $10\mathrm{\%}$.