<p align="right">Last Update: <font color="#4f81bd">November 26, 2024</font></p> ## BIG IDEAS - Every particle has a corresponding antiparticle. - When a particle and antiparticle meet, they annihilate each other, releasing energy (such as gamma rays). - There is an asymmetry between the number of particles and antiparticles, known as baryon asymmetry. --- In 1928, [[Paul Dirac]] predicted antiparticles. The [[Positron|positron]], the antiparticle to the [[Electrons|electron]], was discovered in 1932 by Carl D. Anderson while working with cosmic rays. When [[Matter|matter]] and antimatter interact then they annihilate into pure energy. ### Related Topics --- [[Home|Home]] | [[Particle Physics]] | [[Matter]] | [[Structure of the atom]] | [[Notes Vault/Physics Notes Vault/Particle Physics/Fundamental Forces of Nature|Fundamental Forces of Nature]] | [[Hadrons]] | [[Fermions]] | [[Leptons]] | [[Quarks]] | [[Standard Model]]