Search For A Narrow Resonance In Z(0) Decays Into Hadrons And Isolated Photons

A search for the hadronic decay of a hypothetical resonance S-0 in the process e(+)e(-) --> gamma + hadrons at Z(0) energies is reported. Particular care is taken to optimise the sensitivity to a scalar resonance decaying into bottom quarks, as expected for Higgs production, e(+)e(-) --> Z(0) --> H-0 gamma with H-0 --> b (b) over bar, in the Standard Model or some of its extensions. No evidence for such a resonance is observed in a sample of about 5 million produced Z(0)'s. The results are interpreted in terms of models of non-standard Higgs production. An update of a search for a resonance produced in association with hadrons and the subsequent resonance decay into two photons is also presented.