p 0 -h meson mixing in pd\ 3 Hp ¿ ' 3 Hep 0 reactions

Beam momentum dependence of the experimental cross sections for pd! 3 Hp 1 / 3 Hep 0 reactions have been studied at large proton-pion relative angle. The measurements were performed for five beam momenta in the region of the h meson production threshold. Observed behavior of the measured cross sections ratio reveals manifestations of the isospin symmetry breaking effects. A simple model allows one to interpret the isospin symmetry breaking in terms of p 0 -h meson mixing. Based on that model analysis of the experimental results