Particle physics question:
Proton + anti-proton---> 2Pion+ + 2Pion- + Pion0
anti-proton collides with proton which is at rest. Anti-proton has an energy of 1 GeV, proton mass is 940MeV/c^2, mass of neutral pion is 135 MeV/c^2 and mass of a charged pion is 140MeV/c^2
How much energy was available for kinetic energy of the pions?