Study of φ and f′ 2(1525) meson production in [formula omitted] annihilation at rest

Abstract

The reaction p ̄ p→K +K −π 0 was analysed for antiproton annihilations at rest at three hydrogen target densities. A strong dependence of the p ̄ p→φπ 0 yield on the quantum numbers of the initial state is observed. The branching ratio of the φπ 0 channel from the 3 S 1 initial state is more than 15 times larger than the one from the 1 P 1 state. A large apparent violation of the OZI rule for tensor meson production from p ̄ p -annihilations from the P-waves (1 +++2 ++) is observed: R exp( f′ 2 π 0/ f 2 π 0)=(149±20)·10 −3, significantly exceeding the OZI-rule prediction R=16·10 −3.