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Search for associated production of massive states decaying into two photons in e+e− annihilations at √s = 88–209 GeV

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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  • OPAL Collaboration
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<mark>Journal publication date</mark>19/09/2002
<mark>Journal</mark>Physics Letters B
Issue number1-2
Volume544
Number of pages13
Pages (from-to)44-56
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A search is performed for production of short-lived particles in e+e−→XY, with X→γγ and Y→f¯f, for scalar X and scalar or vector Y. Model-independent limits in the range of 25–60 femtobarns are presented on σ (e+e−→XY ) × B(X→γγ) × B(Y→f¯f) for centre-of-mass energies in the range 205–207 GeV. The data from all LEP centre-of-mass energies 88–209 GeV are also interpreted in the context of fermiophobic Higgs boson models, for which a lower mass limit of 105.5 GeV is
obtained for a “benchmark” fermiophobic Higgs boson.