Supersymmetry, or SUSY, is an elegant extension to the Standard Model that, as well as addressing some very interesting theoretical questions, could also provide a viable candidate for a dark matter constituent.
Antonella, Batool, Nicola, Fab T and Marco are using ATLAS data to search for the production of weakly interacting supersymmetric particles (such as charginos, neutralinos and sleptons) decaying to final states containing two or three leptons. The lightest neutralino is a good candidate constituent of dark matter, making up about one quarter of the universe, and the search for new physics in multileptonic final states is one of the flagship analyses at ATLAS.
Fab S, Mario G, and Dani are also looking for weakly interacting SUSY particles, but in their case they concentrate on final states where there are two or more tau leptons.
Iacopo, Kerim, Sam, and Mario S are working on the ATLAS experiment to discover a mirror copy of the top quark. Its existence would explain why the mass of the Higgs boson is so small with respect to the Planck scale.
Alex C, Fabio and Ioannis probe precisely predicted phenomena for anomalies which would indicate the presence of new physics. Similar phenomena have been giving indications of possible effects in recent years and are considered one of the most promising indications of something new!