First look at $pp$ collisions data at $\sqrt{s}$=13TeV in preparation for a search for squarks and gluinos in final states with jets and missing transverse momentum with the ATLAS detector

In this note a first look on $pp$ collision data collected by the ATLAS experiment at $\sqrt{s}$ = 13 TeV in 2015, corresponding to an integrated luminosity of 78 pb$^{-1}$ is presented. The shapes of distributions measured in data are compared in regions dominated by the $W$+jets, $Z$+jets and combined $t\bar{t}$ and single-top events and show reasonable agreement with Monte Carlo simulation demonstrating the good level of control over these backgrounds to searches for Supersymmetry.