K0 decaying into pi0pi0

Four photons originating from the decay of a K0 into two neutral pions are reconstructed in the electromagnetic calorimeter. In association with the K0 a charged pion (Track 1) and a charged Kaon (Track 2) are created in the pp= annihilation. The charge of the Kaon defines the flavour of the neutral Kaon at the time of the production.