Quarks
These smaller particles were named quarks and are thought to be fundamental particles (not made of anything smaller). There are six different quarks and each one has its own antiparticle.
We need to know about the three below as we will be looking at how larger particles are made from different combinations of quarks and antiquarks.
| Quark | Charge | Baryon Number (B) | Strangeness | Anti Quark | Charge | Baryon Number (B) | Strangeness | |
|---|---|---|---|---|---|---|---|---|
| d | -⅓ | +⅓ | 0 | d̄ | +⅓ | -⅓ | 0 | |
| u | +⅔ | +⅓ | 0 | ū | -⅔ | -⅓ | 0 | |
| s | -⅓ | +⅓ | -1 | s̄ | +⅓ | -⅓ | +1 |
The other three are Charm, Bottom and Top. You will not be asked about these three
| Quark | Charge | Baryon No. | Strangeness | Charmness | Bottomness | Topness |
|---|---|---|---|---|---|---|
| d | -⅓ | +⅓ | 0 | 0 | 0 | 0 |
| u | +⅔ | +⅓ | 0 | 0 | 0 | 0 |
| s | -⅓ | +⅓ | -1 | 0 | 0 | 0 |
| c | +⅔ | +⅓ | 0 | +1 | 0 | 0 |
| b | -⅓ | +⅓ | 0 | 0 | -1 | 0 |
| t | +⅔ | +⅓ | 0 | 0 | 0 | +1 |