Structure in theωππSystem at theA2Mass Region

Evidence is presented for an enhancement in the $\omega \pi \pi$ mass spectrum at the $A_2$ mass region in ${\pi }^{+}p$ interactions at 5 GeV/c. Assuming this effect to be the $A_2$, we calculate the decay rate relative to the $\rho \pi$ decay mode and obtain the results 0.29 ± 0.08 and 0.10 ± 0.04 for the two final states $A_2^{}{}_{}{}^0{\Delta }^{++}$ and $A_2^{}{}_{}{}^{+}p$, respectively. Possible explanations of the discrepancy between these numbers are suggested.