Phi meson
Feynman diagram of the most common ϕ meson decay | |
| Composition | ϕ0 : ss |
|---|---|
| Statistics | Bosonic |
| Family | Mesons |
| Interactions | Strong, Weak, Gravity, Electromagnetism |
| Symbol | ϕ, ϕ0 |
| Antiparticle | Self |
| Theorized | Sakurai (1962) |
| Discovered | Connolly et al. (1963) |
| Types | 1 |
| Mass | 1019.461±0.020 MeV/c2 |
| Mean lifetime | (1.55±0.01)×10−22 s |
| Decays into | |
| Electric charge | 0 |
| Spin | 1 |
| Isospin | 0 |
| Hypercharge | 0 |
| Parity | −1 |
| C parity | −1 |
In particle physics, the phi meson or ϕ meson is a vector meson formed of a strange quark and a strange antiquark. It was the ϕ meson's unexpected propensity to decay into K0
and K0
that led to the discovery of the OZI rule. It has a mass of 1019.461±0.020 MeV/c2 and a mean lifetime of 1.55±0.01 × 10−22 s .