Search for pair production of doubly charged Higgs Bosons in the H⁺+H^-→ µ⁺µ⁺µ^-µ^- final state

Abstract

We report the results of a search for pair production of doubly charged Higgs bosons via pp̅→ H⁺⁺H^--X→µ⁺µ⁺µ^-µ^-X at √s=1.96 TeV. We use a data set corresponding to an integrated luminosity of 1.1 fb-1 collected from 2002 to 2006 by the D0 detector at the Fermilab Tevatron Collider. In the absence of an excess above the standard model background, lower mass limits of M(H_L^±±)>150 GeV/c² and M(H_R^±±)>127 GeV/c² at 95% C.L. are set, respectively, for left-handed and right-handed doubly charged Higgs bosons assuming a 100% branching ratio into muons.