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In this letter, we study the latest bound on the mass of doubly charged Higgs bosons, H±±, 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±± is about 84 GeV.
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