本题目来源于试卷: Elementary Particles，类别为 IB物理学
[问答题]
Which of the followin 6acn d, e2-qgj9:6dgjnou e3gg reactions are possible, and by w pow/ 5a)j/ 9kaijpy.shat interaction could they ockps ji)w .5oa/apy/9 jcur? For those forbidden, explain why.
(a) $p + \pi^- \to K^+ + \Sigma^-$
(b) $p + \pi^+ \to K^+ + \Sigma^+$
(c) $p + \pi^- \to \Lambda^0 + K^0 + \pi^0$
(d) $p + \pi^+ \to \Sigma^0 + \pi^+$
(e) $p \to \pi^+ + e^- + \bar{\nu}_e$
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