Search for new phenomena in the Z(->ll) + E^T_miss final state at √ s = 13 TeV with the ATLAS detector

This presentation will show a search for new phenomena in Z(->ll) + Emiss has been performed using 13.3 fb−1 p-p collision data collected by the ATLAS detector in 2015 and first half of 2016. The results was published in ICHEP 2016. Three models were considered in the analysis: (a) Higgs boson invisible decay in ZH(Z ->ll ) mode; (b) Dark Matter particles produced in association with leptonically decaying Z boson; (c) heavy resonance decaying to ZZ(->vv) final state. The analysis was optimized for each model to obtain the best sensitivity. This analysis looks for an excess over the Standard Model predictions in E^T_miss or ZZ transverse mass distribution depending on model. Results show that data are compatible with the Standard Model expections. The 95% CL limits on model parameters were derived.