Abstract
Exotic events with a large missing transverse momentum (up to 80–90 GeV/ c) observed at the CERN p p collider are shown to require, by their signature and effective cross section, the existence of an object with a mass of about 180 GeV/ c 2, which would be produced in a resonance way from hadron beam constituents and would be able to decay into W jet and Z jet. An excited quark q ∗ produced in qg fusion and decaying into Wq and Zq seems to be the most natural candidate for such an object. However, one cannot exclude excited colour boson W C ∗ produced in q q collisions and decaying into Wg and Zg.
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