SM Chart



Symbol MeV/c2 Charge Spin lifetime Comment








Quarks







bottom b 4.180E+09 -1/3 1/2 Unknown Emergent particles, only exist when bound together

charm c 1.280E+09 2/3 1/2 Unknown Emergent particles, only exist when bound together

top t 1.731E+08 2/3 1/2 Unknown Emergent particles, only exist when bound together

strange d 9.600E+07 -1/3 1/2 Unknown Emergent particles, only exist when bound together

down d 4.700E+06 -1/3 1/2 Unknown Emergent particles, only exist when bound together

up u 2.200E+06 2/3 1/2 Unknown Emergent particles, only exist when bound together








Leptons







tau τ- 1.777E+09 -1 1/2 2.9E10-13 Lifetime to short to be a factor in the real world

muon μ- 1.057E+08 -1 1/2 2.2E10-6 Lifetime to short to be a factor in the real world

tau neutrino ντ 1.820E+07 0 1/2 <infinite

electron e- 5.110E+05 -1 1/2 infinite

muon neutrino νμ 1.700E+05 0 1/2 <infinite

electron neutrino νe 2.200E+00 0 1/2 <infinite








Gauge Bosons







Z Boson Z⁰ 9.119E+10 0 1 2.4E10-25 Lifetime to short to be a factor in the real world

W Boson W⁺ 8.039E+10 +/-1 1 2.4E10-25 Lifetime to short to be a factor in the real world

Gluon g 0.000E+00 0 1 Unknown Emergent particles, only exist when bound together

photon γ 0.000E+00 0 1 <infinite








Scalar Boson







Higgs H 1.240E+10 0 0 1.561E-022 Lifetime to short to be a factor in the real world








Hadrons





Composite particles

Proton p



Composed of three quarks (uud)

Neutron n



Composed of three quarks (udd)