  The $\bar{\Omega}/\Omega$ ratio originating from string decays is predicted
to be larger than unity in proton proton interactions at SPS energies ($E_{\rm
lab}$=160 GeV). The anti-omega dominance increases with decreasing beam energy.
This surprising behavior is caused by the combinatorics of quark-antiquark
production in small and low-mass strings. Since this behavior is not found in a
statistical description of hadron production in proton proton collisions, it
may serve as a key observable to probe the hadronization mechanism in such
collisions.
