Strange B meson
| Composition |
b s |
|---|---|
| Statistics | Bosonic |
| Interactions | Strong, Weak |
| Symbol | B s |
| Antiparticle |
B s ( b s ) |
| Mass | 5366.3±0.6 MeV/c2 |
| Mean lifetime | 1.470+0.027 −0.026×10−12 s |
| Decays into | See B0 s decay modes |
| Electric charge | 0 e |
| Spin | 0 |
The
B
s meson is a meson composed of a bottom antiquark and a strange quark. Its antiparticle is the
B
s meson, composed of a bottom quark and a strange antiquark.
Strange B mesons are noted for their ability to oscillate between matter and antimatter via a box-diagram with Δms = 17.77 ± 0.10 (stat) ± 0.07 (syst) ps−1 measured by CDF experiment at Fermilab. That is, a meson composed of a bottom quark and strange antiquark, the strange
B
meson, can spontaneously change into an bottom antiquark and strange quark pair, the strange
B
meson, and vice versa.
On 25 September 2006, Fermilab announced that they had claimed discovery of previously-only-theorized Bs meson oscillation. According to Fermilab's press release:
...
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