A search for the Higgs boson in final states with one, two or three
isolated photons has been performed based on data taken at LEP 2 by the
DELPHI detector. The data analysed correspond to a total integrated
luminosity of 67.5 pb(-1) at centre-of-mass energies of 161 GeV (9.7
pb(-1)), 172 GeV (10.1 pb(-1)) and 183 GeV (47.7 pb(-1)). No evidence
for the processes e(+)e(-) –> H gamma with H –> b (b) over bar or
gamma gamma and e(+)e(-) –> Hq (q) over bar with H –> gamma gamma was
observed. Model-independent limits on sigma(e(+)e(-) –> H gamma) x BR(H
–> b (b) over bar), sigma(e(+)e(-) –> Hq (q) over bar) x BR(H –>
gamma gamma) and sigma(e(+)e(-) –> H gamma) x BR(H –> gamma gamma) are
set, as well as model-dependent limits on Higgs boson anomalous
couplings to vector bosons. (C) 1999 Published by Elsevier Science B.V.
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