S-WAVE STRUCTURE IN THE K$pi$ SYSTEM.

We have analysed the Kπ spectrum (4 827 events) of the reaction K+n→K+π−p at 9 GeV/c and find evidence of a broad S-wave enhancement which may be interpreted as a resonance. For production of Kπ masses above 890 GeV/c2, we have assumed the dominance of pion exchange.