Search for Doubly-charged Higgs Boson Production in the Decay H++H-- ->   mu+mu+mu-mu- with the DO Detector at sqrt{s}=1.96} TeV
  A search for the pair production of doubly-charged Higgs bosons in the process $\ppbar\to\Hpp\Hmm\to \mu^+\mu^+\mu^-\mu^-$ is performed with the D\O\ Run II detector at the Fermilab Tevatron using inclusive di-muon events. These data taken at an energy of $\sqrt{s}=1.96$ TeV correspond to an integrated luminosity of $113 $pb$^{-1}$ and were recorded by D{\O}between August 2002 and June 2003. In the absence of a signal, 95% Confidence Level mass limits of $M(\HpmL)>118.6$ GeV and $M(\HpmR)>98.1$ GeV are set on the pair production cross section for left-handed and right-handed doubly-charged Higgs bosons, assuming 100% branching into muons and hypercharge $|Y|=2$. 
Marian Zdrazil