- #1

- 31

- 0

## Homework Statement

A positron having a kinetic energy equal to its rest mass energy mec^2 collides with a stationary electron. The positron and the electron annihilate in the process and two photons are created. What is the maximum possible energy of a photon produced in the annihilation process??

## Homework Equations

4-momentum vectors(??)

CM frame can help ??