LHC Run-I constraint on the mass of doubly charged Higgs bosons in the same-sign diboson decay scenario

In this letter, we study the latest bound on the mass of doubly charged Higgs bosons, $H^{\pm \pm }$ , assuming that they dominantly decay into a diboson. The new bound is obtained by comparing the inclusive searches by the ATLAS Collaboration [ATLAS Collaboration, J. High Energy Phys. 1503, 041 (2015)] for events with a same-sign dilepton using the latest 20.3 fb $^{-1}$ data at the Large Hadron Collider 8 TeV run with a theoretical prediction based on the Higgs triplet model with next-to-leading order QCD corrections. We find that the lower mass bound on $H^{\pm \pm }$ is about 84 GeV.