Answer to Question #124817 in Physics for Maria

Question

What do you think of neutral pion decay shows cp violation? Support answer any experimental aspects

Answer 1

Neutral pions decay into two photons via electromagnetic force according to the following equation:

$$π^0→2γ.$$

The decay according to the equation

$$π^0→3γ$$

is forbidden because it violates C-parity. No decays that follow the last equation experimental were observed.