Question
(a) What is the uncertainty in the energy released in the decay of a $\pi^0$ due to its short lifetime? (b) What fraction of the decay energy is this, noting that the decay mode is $\pi^0 \to \gamma + \gamma$ (so that all the $\pi^0$ mass is destroyed)?
1. $3.9 \textrm{ eV}$
2. $2.9\times 10^{-8}$
Solution Video