The role of $N^{\ast }(1535)$ in $pp\to pp\varphi$ and ${\pi }^{-}p\to n\varphi$ reactions

J. J. Xie, B. S. Zou, H. C. Chiang

The near threshold $\varphi$ meson production in proton-proton and ${\pi }^{-}p$ collisions is studied with the assumption that the production mechanism is due to the sub-$N\varphi$-threshold $N^*(1…