Fermiophobic Higgs bosons at LEP

TL;DR

This paper reports combined results from LEP experiments searching for fermiophobic Higgs bosons, setting mass limits based on decay channels into photons and weak bosons, thus constraining new physics models.

Contribution

It provides the first combined LEP analysis setting mass limits on fermiophobic Higgs bosons considering multiple decay modes.

Findings

Lower mass limit of 109.7 GeV for fermiophobic Higgs decaying into photons.

Extended mass limit by 5 GeV when including decay into weak bosons.

Combined data from four LEP experiments enhances the sensitivity of Higgs searches.

Abstract

This work describes the results of the searches for a Higgs boson decaying into gauge bosons carried out by the four LEP collaborations: ALEPH, DELPHI, L3 and OPAL. A lower bound of 109.7 GeV is set at 95% confidence level on the mass of a fermiophobic Higgs boson decaying into photons. This mass limit can be extended by considering the Higgs decay mode into weak bosons. Such a combination has been done by the L3 collaboration which extended the fermiophobic mass by 5 GeV.