| Bottom eta meson | |
| Num Types: | 1 |
| Statistics: | Bosonic |
| Group: | Mesons |
| Interaction: | Strong, weak, electromagnetic, gravity |
| Antiparticle: | Self |
| Discovered: | SLAC (2008) |
| Electric Charge: | 0 e |
| Spin: | 0 |
| Isospin: | 0 |
| Hypercharge: | 0 |
| Parity: | -1 |
| C Parity: | +1 |
The bottom eta meson or eta-b meson is a flavourless meson formed from a bottom quark and its antiparticle. It was first observed by the BaBar experiment at SLAC in 2008, and is the lightest particle containing a bottom and anti-bottom quark.