Search for Physics Beyond the Standard Model in Z + Jets + MET events at the LHC

This paper presents an update of a search for Physics beyond the Standard Model in final states with a $Z$ boson, jets and missing transverse energy. The Jet-$Z$ Balance method is used to estimate the total background expected in the signal region from data control samples. The size of the data corresponds to an integrated luminosity of~2.1\,fb${}^{-1}$. In the absence of any significant excess beyond the SM expectation, upper limits are set in the context of simplified models of supersymmetry, taking into account signal contribution to the control samples.