Bottom eta meson
The bottom eta meson (
η
b) 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.
| Composition | b b |
|---|---|
| Statistics | Bosonic |
| Family | Mesons |
| Interactions | Strong, weak, electromagnetic, gravity |
| Symbol | η b |
| Antiparticle | Self |
| Discovered | SLAC (2008) |
| Types | 1 |
| Mass | 9388.9+3.1 −2.3 MeV/c2 |
| Electric charge | 0 e |
| Spin | 0 |
| Isospin | 0 |
| Hypercharge | 0 |
| Parity | -1 |
| C parity | +1 |
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