Search for a doubly-charged Higgs boson with $\sqrt{s}=8~\mathrm{TeV}$ $pp$ collisions at the CMS experiment

A search for doubly-charged Higgs boson in proton-proton collisions at $\sqrt{s} = 8$ TeV is presented. The data corresponds to an integrated luminosity of $19.7~\textrm{fb}^{-1}$, collected by the CMS experiment at the LHC. The search considers leptonic final states with three or four electrons or muons which probe the associated production of $\Phi^{\pm\pm}\Phi^{\mp}$ and Drell-Yan pair production of $\Phi^{++}\Phi^{--}$. No excess over Standard Model background expectations is observed and upper limits at the $95\%$ confidence level are placed on the cross sections times branching ratio. Lower bounds on the doubly-charged Higgs boson mass are reported for a variety of assumptions on its branching ratio to charged lepton pairs.