Search for Doubly Charged Higgs Bosons with the OPAL detector at LEP

TL;DR

This paper reports a search for doubly charged Higgs bosons using OPAL detector data at LEP energies between 189 and 209 GeV, setting a mass limit of 98.5 GeV/c2 and marking the first such search at energies above 91 GeV.

Contribution

First search for doubly charged Higgs bosons at centre-of-mass energies above 91 GeV, establishing new mass limits in left-right symmetric models.

Findings

No evidence for doubly charged Higgs bosons was observed.

A mass limit of 98.5 GeV/c2 was set at 95% confidence level.

This is the first search at energies larger than 91 GeV.

Abstract

A search for pair-produced doubly charged Higgs bosons has been performed using data samples corresponding to an integrated luminosity of about 614 pb-1 collected with the OPAL detector at LEP at centre-of-mass energies between 189GeV and 209GeV. No evidence for a signal has been observed. A mass limit of 98.5GeV/c2 at the 95% confidence level has been set for the doubly charged Higgs particle in left-right symmetric models. This is the first search for doubly charged Higgs bosons at centre-of-mass energies larger than 91GeV.