Chapter 32, Problem 13Q

To determine

The particles decay via weak interaction.

Answer to Problem 13Q

Solution:

The particle $\text{J/}\psi$ and Y decay via weak interaction.

Explanation of Solution

The life time of $\text{J/}\psi$ is $0.71\times {10}^{-20}\text{ s}$.

The life time of Y is $1.2\times {10}^{-20}\text{ s}$.

Both these particles decay via electromagnetic interaction as their life time are least among all the particles.

Thus, the particle $\text{J/}\psi$ and Y decay via weak interaction.