Search for new phenomena using dimuon final states with ATLAS at LHC

We present the searches for both resonant and non-resonant new phenomena in dimuon final states with the ATLAS experiment. The results shown in this talk will include data corresponding to an integrated luminosity of 3.2 $fb^{-1}$ at 13 TeV. No new physics signature has been observed in data. The upper mass limits on the new gauge boson Z’ for dimuon channel are set at 95\% conference level at 2.98 TeV for the Sequential Standard Model, and at 2.71 TeV and 2.42 TeV for the $E_{6}$ model for $Z’_{\chi}$ and $Z’_{\psi}$, respectively. In addition, limits are set on the llqq contact interaction scale $\Lambda$ between 14.5 TeV and 20.2 TeV.