1. The problem statement, all variables and given/known data Calculate the minimum beam energy in a proton-proton collider to initiate the p+p→p+p+n0 reaction. The rest energy of the no is 547.3MeV. 2. Relevant equations For a head on collision between particles a and b, from conservation of total energy: Ex = Ep + Ep' = 2Ep so that mx^2c^4 = Ex^2 - px^2c^2 = (2Ep)^2 3. The attempt at a solution Rearranging the above, gives mx = 2Ep/c^2 So using the values I have been provided: Ep = (547.3MeV)/2 = 0.2737Gev I am not sure if my method is correct?