The exclusive electroproduction of omega mesons, ep --> e omega p, has been
studied in the kinematic range 3 < Q(2) < 20 GeV2, 40 < W< 120 GeV and /t/
< 0.6 GeV2 with the ZEUS detector at HERA using an integrated luminosity o
f 37.7 pb(-1). The omega mesons were identified via the decay omega --> pi(
+)pi(-)pi(0). The exclusive cross section in the above kinematic region is
sigma(ep-->e omega p) = 0.108 +/- 0.014(stat.) +/- 0.026(syst.) nb. The rea
ction ep --> e phi p, phi --> pi(+)pi(-)pi(0), has also been measured. The
cross sections, as well as the ratios sigma(gamma)(.) (p --> omega p)/sigma
(gamma)(.) (0)(-->rho)(p) and sigma(gamma)(.) (p -->omega p)/sigma(gamma)(.
) (p -->phi p), are presented as a function of w and Q(2) Thus, for the fir
st time, the properties of omega electroproduction can be compared to those
of rho(0),phi and J/psi electroproduction at high W. (C) 2000 Elsevier Sci
ence B.V. All rights reserved.