Determining systematic uncertainties of boosted tau pair reconstruction and identification efficiencies in ATLAS

Tau reconstruction and identification plays an important role in the search for new physics in the ATLAS experiment at the LHC. Pairs of tau leptons with a boosted topology are produced in some channels and are possible final states in BSM scenarios, such as a graviton decaying into two Higgs particles. Since the two taus may be characterized by a low spatial separation, standard tau identification is not possible in this regime. Therefore a special approach for reconstruction and identification of boosted tau pair topologies has been developed. This talk focusses on semi-leptonic di-taus as final states. The calculation of systematic uncertainties for the reconstrucion and identification efficiencies using various simulated detector modifications is presented.