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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


<mark>Journal publication date</mark>19/09/2002
<mark>Journal</mark>Physics Letters B
Issue number1-2
Number of pages9
Pages (from-to)16-24
<mark>Original language</mark>English


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.