Family 1 |
Family 2 |
Family 3 |
|||
Particle |
Mass |
Particle |
Mass |
Particle |
Mass |
Electron |
.00054 |
Muon |
.11 |
Tau |
1.9 |
Electron-neutrino |
< 10-8 |
Muon-neutrino |
< .0003 |
Tau-neutrino |
< .033 |
Up-quark |
.0047 |
Charm Quark |
1.6 |
Top Quark |
189 |
Down-quark |
.0074 |
Strange Quark |
.16 |
Bottom Quark |
5.2 |
Table 1.1 The three families of fundamental particles and their masses (in multiples of the proton mass). The values of the neutrino masses have so far eluded experimental determination.