A Search for Doubly-Charged Bosons decaying to Like-Sign Dileptons at CDF with 6.1 fb$^{-1}$

# A Search for Doubly-Charged Bosons decaying to Like-Sign Dileptons at CDF with 6.1 fb$^{-1}$ D. Whiteson and R. Porter, UC Irvine V. Rusu, FNAL P. Wittich and P. Kittiwisit, Cornell

## Conference note

 (Click each plot for PDF) Upper limits at 95\% CL on the production cross-section for doubly-charged Higgs, assuming 100% branching fraction to $ee,\mu\mu$ or $e\mu$. Also shown are next-to-leading-order theoretical calculations of the cross-section, assuming the Higgs is a member of a singlet, doublet or triplet. (Click each plot for PDF) Distribution of jet multiplicity in observed same-sign dilepton events and expected backgrounds. (Click each plot for PDF) Distribution of missing transverse energy in observed same-sign dilepton events and expected backgrounds. (Click each plot for PDF) Distribution of leading lepton $p_T$ in observed same-sign dilepton events and expected backgrounds. (Click each plot for PDF) Reconstructed like-sign dilepton invariant mass for signal H++/-- events (Click each plot for PDF) Reconstruction efficiency versus Higgs mass in $ee$ (left) $e\mu$ (center), and $\mu\mu$ (right) events. (Click each plot for PDF) Signal and backgrounds in the $ee,\mu\mu$ and $e\mu$ channels with example $H^{++ (Click each plot for PDF) Observed and expected limits compared to the theoretical predictions for the$ee$(top),$e\mu$(center) and$\mu\mu\$ (bottom) channels.