Reconstruction of stop quark mass at the LHC

Abstract

The cascade mass reconstruction approach was applied to simulated production of the lightest stop quark at the LHC in the cascade decay $\tilde{g}\to \text{sTop}\text{Top}\to {\tilde{\chi }}_2^0\text{Top}\text{Top}\to {\tilde{\ell }}_R\ell \text{Top}\text{Top}\to {\tilde{\chi }}_1^0\ell \ell \text{Top}\text{Top}$ 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 $\mathrm{f}{\mathrm{b}}^{-1}$ 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 $10\%$.

Comments: 6 pages, 6 figures