Search for high-mass resonances decaying into muon pairs with the CMS experiment at LHC

A search for new narrow resonances in dimuon invariant mass spectra has been performed using data obtained from proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13$ TeV. The integrated luminosity corresponds to $2.8~\mathrm{fb}^{-1}$. No evidence for non-standard-model physics is found, nor when these results are combined with the dielectron channel. Upper bounds are set on the masses of hypothetical particles that arise in new-physics scenarios. For the $Z'_{SSM}$ particle, which arises in the sequential standard model, and for the superstring inspired $Z'_{\psi}$ particle, 95% confidence level lower mass limits for the combined channels are found to be $3.15$ and $2.60$ TeV, respectively. These results extend previous limits significantly.