A measurement of the top quark mass in topologies enhanced with single top quarks produced in the $t$-channel produced via weak interactions is presented. The dataset was collected at a centre-of-mass energy of $\sqrt{ s}=8\,\mathrm{ TeV}$ with the ATLAS detector at the LHC and corresponds to an integrated luminosity of $20.3\,\mathrm{ fb^{ -1}}$. To determine the top quark mass a template method is used based on the distribution of the invariant mass of the lepton and the $b$-tagged jet as estimator. The result of the measurement is $m_{ \mathrm{ top}} = 172.2 \pm 0.7 { \mathrm{ (stat.)}} \pm 2.0 { \mathrm{ (syst.)}}\,\mathrm{ GeV}$.
Categories: hep-ex