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## Homework Statement

Tow protons of equal energy collide head on and the result is

p+p -----> p+p+ Pi

^{0}

If all particles produced at rest what must be the KE of the initial protons

## Homework Equations

mass of Pi

^{0}= 135MeV/c

^{2}

## The Attempt at a Solution

Total energy of the system, E= mc

^{2}

Mass of proton = 1.6726 *10

^{-27}Kg

Hence initial energy = 2* 1.6726*10

^{-27}*2.99*10

^{8}*2.99*10

^{8}

But in this case why do I need the mass of Pi 0...I guess I am terribly worng pls help