However, there is some probability (from <0.1% to 1.2%) involved with the decay of some pions, as they can also decay into different forms. For π, the second most likely decay product is one positron (an anti-electron) and one electron neutrino. π will sometimes decay into one electron and one electron antineutrino. π will sometimes decay into one highly-energized photon, one electron, and one positron. (Keep in mind that positrons and electrons can annihilate each other, and this annihilation produces highly-energized photons).