Search for Doubly Charged Higgs Bosons with Lepton-Flavor-Violating Decays involving Tau Leptons

TL;DR

This paper reports a search for doubly charged Higgs bosons decaying into lepton-flavor-violating pairs involving tau leptons, setting new lower mass limits based on proton-antiproton collision data.

Contribution

First search for doubly charged Higgs bosons decaying into electron-tau and muon-tau pairs with specific final states at the Tevatron collider.

Findings

Lower mass limit of 114 GeV/cc for left-handed doubly charged Higgs.

Lower mass limit of 112 GeV/cc for alternative decay channels.

No evidence found for the existence of such particles.

Abstract

We search for pair production of doubly charged Higgs particles followed by decays into electron-tau and muon-tau pairs using data (350 inverse picobarns) collected from proton-antiproton collisions at 1.96 TeV by the CDF II experiment. We search separately for cases where three or four final-state leptons are detected, and combine results for exclusive decays to left-handed electron-tau (muon-tau) pairs. We set a lower mass limit of 114 (112) GeV/cc at the 95% confidence level for left-handed doubly charged Higgs.