Chapter 11, Problem 36P

Which of the following reactions cannot because the law of conservation of strangeness is violated?

1. $\text{p}+\text{n}\to \text{p}+\text{p}+{\pi }^{-}$

$\text{p}+\text{n}\to \text{p}+\text{p}+{\text{K}}^{-}$

$K^{-}+\text{p}\to {\text{K}}^{-}+{\sum }^{+}$

${\pi }^{-}+\text{p}\to {\text{K}}^{-}+{\sum }^{-}$

$K^{-}+\text{p}\to {\Xi }^0+K^{+}+{\pi }^{-}$

$K^{-}+\text{p}\to {\Xi }^0+{\pi }^{-}+{\pi }^{-}$

${\pi }^{+}+\text{p}\to {\sum }^{+}+K^{+}$

${\pi }^{-}+\text{n}\to K^{-}+{\Lambda }^0$