In a search for signatures of physics processes beyond the Standard Model,
various eeqq vector contact-interaction hypotheses have been tested using t
he high-Q(2) deep inelastic neutral-current e(+)p scattering data collected
with the ZEUS detector at HERA. The data correspond to an integrated lumin
osity of 47.7pb(-1) of e(+)p interactions at 300 GeV center-of-mass energy.
No significant evidence of a contact-interaction signal has been found. Li
mits at the 95% confidence level are set on the contact-interaction amplitu
des. The effective mass scales Lambda corresponding to these limits range f
rom 1.7 TeV to 5 TeV for the contact-interaction scenarios considered.