On the $\Lambda$ to ${\Sigma }^0$ ratio from proton-proton collisions

A. Sibirtsev, K. Tsushima, W. Cassing +1

We compare the recent COSY data on the total $pp\to p\Lambda K^{+}$ and $pp\to p{\Sigma }^0{K}^{+}$ cross sections with the predictions from two boson exchange models that either are based solely…