| Sigma Particle Type | Quark Composition | Rest Mass in MeV |
| Sigma | uus uds dds |
1,189.4 1,192.5 1,197.3 |
| Charmed Sigma | uuc udc ddc |
2,454.0 2,452.9 2,453.8 |
| Bottom Sigma | uub udb ddb |
5,807.8 Unknown 5,815.2 |
| Top Sigma | uut, udt, ddt | ---------- |
The family of sigma baryons. The mass of one of the bottom sigma particles (udb) has yet to be determined. Considering the instability of the top quark, it is highly unlikely that the top sigmas will be identified, though they are predicted by theory.
| 1st Generation | 2nd Generation | 3rd Generation | |
| "Up" Type Quarks |
Up Quark Mass: 1.87-2.15 MeV Charge: 2/3 Spin: 1/2 ID: u, u |
Charm Quark Mass: 1.18-1.34 GeV Charge: 2/3 Spin: 1/2 ID: c, c |
Top Quark Mass: 172.6-173.6 GeV Charge: 2/3 Spin: 1/2 ID: t, t |
| "Down" Type Quarks |
Down Quark Mass: 4.63-4.95 MeV Charge: -1/3 Spin: 1/2 ID: d, d |
Strange Quark Mass: 90-100 MeV Charge: -1/3 Spin: 1/2 ID: s, s |
Bottom Quark Mass: 4.2 or 4.68 GeV Charge: -1/3 Spin: 1/2 ID: b, b |
Quark Summary (compiled from a number of different sources)
| Particle Type Click name for more: |
Quark Composition | Rest Mass in MeV |
| Proton | uud | 938.3 |
| Neutron | ddu | 939.6 |
| Lambda Charmed Lambda Bottom Lambda Top Lambda |
uds udc udb udt |
1,115.6 2,281.0 5,620.2 ---------- |
| Sigma | ||
| Delta | uuu, uud, udd, ddd | 1232.0 |
| Xi | ||
| Omega |
Baryons - Sigma Particles
Physics
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Composite Particles
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