Key Stage 5
Meaning
A bottom-quark (b) is a type of quark with a charge of \(-\frac{1}{3}\).
About Bottom-quarks
| Quark | Charge/e | Strangeness | Baryon Number | Lepton Number |
| \(Q=-\frac{1}{3}\) | \(S=0\) | \(b=+\frac{1}{3}\) | \(l=0\) | |
| \(Q=+\frac{1}{3}\) | \(S=0\) | \(b=-\frac{1}{3}\) | \(l=0\) |