Particle Zoo

The Standard Model

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The Bottom Quark

Symbol: b
Group: fermion, quark
Rest mass: 4.51 u
Diameter: 0
Charge: -1/3 e
Mean lifetime: 1.3 x 10-12 sec
Spin: 1/2
Generation: 3
Bottom quarks (also called beauty quarks) are not stable and quickly decay, mostly to charm quarks and W- bosons. In their short lifetime, they are part of some baryons and mesons. Due to their high mass, bottom quarks are relatively easy to research in experiments, a bottom quark is slightly heavier than a helium atom.



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