J. Breitweg et al., Search for resonance decays to a (nu)over-bar plus jet in e(+)p scatteringat DESY HERA - art. no. 052002, PHYS REV D, 6305(5), 2001, pp. 2002
A study of the <(<nu>)over bar>-jet mass spectrum in e(+) p--><(<nu>)over b
ar>X events at a center-of-mass energy 300 GeV has been performed with the
ZEUS detector at the HERA collider at DESY using an integrated luminosity o
f 47.7 pb(-1). The mass spectrum is in good agreement with that expected fr
om standard model processes over the <(<nu>)over bar>-jet mass range studie
d. No significant excess attributable to the decay of a narrow resonance is
observed. By using both e(+) p-->e(+) X and e(+) p--><(<nu>)over bar>X dat
a, mass-dependent limits are set on the s-channel production of scalar and
vector resonant states. Couplings to first-generation quarks are considered
and limits are presented as a function of the e(+) q and <(<nu>)over bar>q
branching ratios. These limits are used to constrain the production of lep
toquarks and R-parity violating squarks.