- #1

PatrickStar

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## Homework Statement

A 2 GeV electron is incident on proton (m_p * C^2 = 0.938 GeV) target at rest. Calculate the invariant mass of the electron-proton pair in the Center of Mass(CM) frame. Neglect the mass of electron which is much less than the proton mass.

## Homework Equations

M = [P1 + P2)][/2]

M = gamma([m][/0])

## The Attempt at a Solution

My first attempt was to calculate the mass through the second equation in relevant equations but I don't think that was correct. Because it went like this:

M = ([m][/0])/sqrt(1-(([v][/2])/[c][/2]) but I don't think that is necessarily the right step forward.

Any help would be much appreciated!