The reaction π+p→π+pπ0π0 at 4 GeV/c: No evidence for a narrow ϵ

The Track Sensitive Target technique has been used to isolate 5000 events from the reaction π+p→π+pπ0π0 at 4 GeV/c. Channel cross sections are measured. The data agree with predictions from phase-shift analyses of π+π− data: the effect of the S∗ is clearly seen. There is strong evidence against any narrow ϵ below 1 GeV/c2.