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Search for gamma gamma decays of a Higgs boson in e+ e- collisions at s**(1/2) up to 209-GeV

Research output: Contribution to journalJournal article

Published

Journal publication date19/09/2002
JournalPhysics Letters B
Journal number1-2
Volume544
Number of pages9
Pages16-24
Original languageEnglish

Abstract

A search for events with a photon pair arising from the decay of a Higgs boson produced in association with a fermion pair, is performed in 893 pb−1 of data recorded by the ALEPH detector at LEP at centre-of-mass energies up to 209 GeV. No excess of such events is found over the expected background. An upper limit is derived on the product of the e+e−→HZ cross section and the H→γγ branching fraction as a function of the Higgs boson mass. A fermiophobic Higgs boson produced with the Standard Model cross section is excluded at 95% confidence level for all masses below 105.4 GeV/c2.