Particle Zoo


The Standard Model

 
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Mesons


Group: boson, hadron

Mesons are particles made of a quark and an antiquark. Apart from the top, every quark can occur. Therefore, 25 (5x5) different mesons and their anitparticles are possible, together with some quantum-mechanical states of superposition between up, down and strange quarks.
Matter and antimatter annihilate each other, so there are no stable mesons. They all decay rather quickly. Nevertheless, the pion plays an important role for the stability of atoms.


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Atom Dark Energy Baryons Mesons Proton Neutron Other Baryons Pion Kaon D-Meson Other Mesons Hadrons Up-Quark Down-Quark Strange-Quark Charm-Quark Bottom-Quark Top-Quark Quarks Leptons Electron Muon Tauon Fermions Neutrinos Electron-Neutrino Muon-Neutrino Tauon-Neutrino Antimatter Dark Matter Gauge Bosons Photon Gluon W-Boson Z-Boson Graviton Higgs-Boson Bosons