Performance of Missing Transverse Momentum (MET) reconstruction with the ATLAS detector - LHCC poster 2017

Accurate and precise measurement of missing transverse momentum (MET) in an event is critical for many of the searches for new physics carried out by the ATLAS experiment. In the last year, several improvements have been introduced to the reconstruction of this quantity, such as distinguishing between jets and electrons, as well as mitigating the impact of jets from multiple proton-proton collisions, especially in the forward region of the detector. This poster aims to illustrate the MET reconstruction performance of the ATLAS experiment, with a particular emphasis on forward pileup jet suppression and systematic uncertainties derivation.