Search for a Higgs Boson Decaying into Two Photons at LEP
L3 Collaboration
TL;DR
This study searches for a Higgs boson decaying into two photons at LEP, setting limits on its mass and decay properties, but finds no evidence of such a signal in the collected data.
Contribution
It provides the first experimental limits on a fermiophobic Higgs boson decaying into two photons at LEP energies.
Findings
No signal observed in the data.
Lower mass limit for fermiophobic Higgs set at 105.4 GeV.
Constraints on Higgs decay branching fractions derived.
Abstract
A Higgs particle produced in association with a Z boson and decaying into two photons is searched for in the data collected by the L3 experiment at LEP. All possible decay modes of the Z boson are investigated. No signal is observed in 447.5 pb^-1 of data recorded at centre-of-mass energies up to 209 GeV. Limits on the branching fraction of the Higgs boson decay into two photons as a function of the Higgs mass are derived. A lower limit on the mass of a fermiophobic Higgs boson is set at 105.4 GeV at 95% confidence level.
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