A Particle that is Both Matter and Antimatter

摘要

All known fundamental particles are either bosons or fermions. Fermions (named after the Italian physicist Enrico Fermi) are subject to the Pauli principle, which forbids two particles being in the same quantum state; bosons 9named after the Indian physicist Satyendranath Bose), by contrast, tend to bunch together in the same state. The elementary particles of matter - electrons, quarks, and neutrinos - are fermions, while photons and other force carriers are bosons.