Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2000-06-30
Nucl.Phys. A684 (2001) 397-399
Physics
Nuclear Physics
Nuclear Theory
3 pages, 1 figure, uses espcrc1.sty, contribution presented at the 16th International Conference on Few-Body Problems in Physi
Scientific paper
10.1016/S0375-9474(01)00407-9
A model calculation for the reactions $pp\to p\Lambda K^+$ and $pp\to N\Sigma K$ near their thresholds is presented. It is argued that the experimentally observed strong suppression of $\Sigma^0$ production compared to $\Lambda$ production at the same excess energy could be due to a destructive interference between the $\pi$ and $K$ exchange contributions in the reaction $pp\to p\Sigma^0 K^+$. Predictions for $pp\to p\Sigma^+ K^0$ and $pp\to n\Sigma^+ K^+$ are given.
Gasparian A. M.
Haidenbauer Johann
Hanhart Ch.
Kondratyuk L.
Speth Josef
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