Search for Long-Lived Doubly-Charged Higgs Bosons in p-pbar Collisions at sqrt{s} = 1.96 TeV

TL;DR

This paper reports a search for long-lived doubly-charged Higgs bosons in proton-antiproton collisions at 1.96 TeV, setting mass exclusion limits based on non-observation of such particles in the data.

Contribution

First search for long-lived doubly-charged Higgs bosons at Tevatron, establishing new mass exclusion limits with 292 pb^{-1} of data.

Findings

Excluded H^{ ext{±±}}_L and H^{ ext{±±}}_R bosons below 133 GeV/c^2 and 109 GeV/c^2

Excluded degenerate H^{ ext{±±}} mass below 146 GeV/c^2

No evidence found for long-lived doubly-charged Higgs bosons

Abstract

We present a search for long-lived doubly-charged Higgs bosons (H^{\pm \pm}), with signatures of high ionization energy loss and muon-like penetration. We use 292/pb of data collected in p-pbar collisions at sqrt{s} = 1.96 TeV by the CDF II detector at the Fermilab Tevatron. Observing no evidence of long-lived doubly-charged particle production, we exclude H^{\pm \pm}_L and H^{\pm \pm}_R bosons with masses below 133 GeV/c^2 and 109 GeV/c^2, respectively. In the degenerate case we exclude H^{\pm \pm} mass below 146 GeV/c^2. All limits are quoted at the 95% confidence level.