Study of φ and f′2(1525) meson production in p̄p annihilation at rest

The reaction p̄p→K+K−π0 was analysed for antiproton annihilations at rest at three hydrogen target densities. A strong dependence of the p̄p→φπ0 yield on the quantum numbers of the initial state is observed. The branching ratio of the φπ0 channel from the 3S1 initial state is more than 15 times larger than the one from the 1P1 state. A large apparent violation of the OZI rule for tensor meson production from p̄p-annihilations from the P-waves (1+++2++) is observed: Rexp(f′2π0/f2π0)=(149±20)·10−3, significantly exceeding the OZI-rule prediction R=16·10−3.