We present the results of a search for doubly-charged Higgs
bosons (H+/- +/-) decaying to dileptons using \approx 240 pb-1 of p anti-p
collision data collected by the CDF II experiment at the Fermilab Tevatron.
In our search region, given by same-sign dilepton mass m_w > 80 GeV/c2 (100
GeV/c2 for dielectron channel), we observe no evidence for doubly-charged
Higgs production. We set limits on sigma(p anti-p --> H++ H-- --> l+ l+ l-
l-) as a function of the mass of the doubly-charged Higgs boson and the
chirality of its couplings. Assuming exclusive same-sign dilepton decays,
we derive lower mass limits on H+/- +/-_L of 133 GeV/c2, 136 GeV/c2, and
115 GeV/c2 in the ee, mu mu, and e mu channels, respectively, and a lower
mass limit of 113 GeV/c2 on H+/- +/-_R in the mu mu channel, all at the
95% confidence level.
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Updated: Tuesday, 2004 December 28 12:56:50 CST automatically from input from Carol Picciolo