Jets, $E_T^{miss}$, and Jet Substructure and Tagging Performance in ATLAS

ATLAS has implemented and commissioned several new techniques for the analysis and interpretation of hadronic final states at the LHC. These include event-by-event pile-up subtraction algorithms for jets and $E_T^{miss}$, jet substructure, quark-gluon discrimination, and jet tagging tools for the identification of boosted heavy particles. The excellent ATLAS detector capabilities, in particular its high resolution longitudinally segmented calorimeter and inner detector, have enabled the development of complex clustering and calibration algorithms for the reconstruction of jets, $E_T^{miss}$, and jet substructure, and its validation and calibration in data using large datasets collected during 2012. A summary of the most modern jet, $E_T^{miss}$, and jet substructure and tagging tools developed in ATLAS, and their calibrations are presented.