The Standard Model 6 quarks (those little The Standard Model 4 fellows in the nucleus) Fermions Bosons and their antiparticles C t Quarks up charm 6 leptons (of which the d b down electron is an example) Ve W electron muon tau W boson ers and their antiparticles eptons poutnno cutnno e T g 4 force carrier particles electron muon tau (of which the photon is Higgs" boson an example) Source:AAAS "Yet to be confirmed All known matter is composed of composites of quarks and leptons which interact by exchanging force carriers. 9 上海交大董占海上海交大 董占海 9 The Standard Model • 6 quarks (those little fellows in the nucleus) and their antiparticles. • 6 leptons (of which the electron is an example) and their antiparticles • 4 force carrier particles (of which the photon is an example) • All known matter is composed of composites of quarks and leptons which interact by exchanging force carriers