What is the minimum uncertainty in the energy of a \rho meson?

[dalarev]

[SOLVED] Restmass, lifetime of a meson

Homework Statement

A \rho meson is a highly unstable subatomic particle with a rest mass of 776 MeV/c^2 and a mean lifetime of 4\times10^{-24}s. What is the minimum uncertainty in the meson's energy?

Homework Equations

We know that rest energy of a particle E = mc^2, m being rest mass I'm assuming.

The Attempt at a Solution

I don't even know where to begin. I'm not sure what they're asking, and what it is I need to calculate.

 

[Doc Al]

I suspect that they want you to apply the so-called energy-time uncertainty principle. Look it up!