21. Particle-antiparticle annihilation will create EM radiation. 22. With the + subscript indicating the particle and " subscript for the antiparticle . 23. And each has its associated antiparticle : electron antineutrino, muon antineutrino and tau antineutrino. 24. According to the theory, matter can only be created in particle-antiparticle pairs. 25. Antiparticles are created everywhere in the universe where high-energy particle collisions take place.26. Thus, antiparticles are represented as moving backward along the time axis in Feynman diagrams. 27. The only difference is that the value of the energy is negative for the antiparticle . 28. Even some chargeless bosons may not be their antiparticles such as some of the gluons. 29. The difference between a particle and its antiparticle is that the fundamental charges are opposite. 30. The Feynman Stueckelberg interpretation states that antimatter and antiparticles are regular particles traveling backward in time.
