Search for Charged Higgs Bosons at LEP

TL;DR

This paper reports a search for charged Higgs bosons at LEP, analyzing data from 189 to 209 GeV, setting mass limits between 76.5 and 82.7 GeV based on decay modes, with no significant signal found.

Contribution

First search for charged Higgs bosons at LEP with comprehensive data analysis, establishing new lower mass limits based on decay channels.

Findings

No significant excess observed.

Mass limits set between 76.5 and 82.7 GeV.

Limits depend on decay branching ratios.

Abstract

A search for pair-produced charged Higgs bosons is performed with the L3 detector at LEP using data collected at centre-of-mass energies between 189 and 209GeV, corresponding to an integrated luminosity of 629.4/pb. Decays into a charm and a strange quark or into a tau lepton and its neutrino are considered. No significant excess is observed and lower limits on the mass of the charged Higgs boson are derived at the 95% confidence level. They vary from 76.5 to 82.7GeV, as a function of the H->tv branching ratio.