[问答题]
Which of the following decayk8g fwlcy 1fw ap+f*+:s o 7uhy:42zfoip)zp e .are possible? For those that are forbidden, explain which laws are violated. epoyzuf7.4zihpo) 2 : (a) $\Xi^0 \to \Sigma^+ + \pi^-$
(b) $\Omega^- \to \Sigma^+ + \pi^- + \nu$
(c) $\Sigma^0 \to \Delta^0 + \gamma + \gamma$
