B-physics
| Composition | Elementary particle |
|---|---|
| Statistics | Fermionic |
| Generation | Third |
| Interactions | Strong, Weak, Electromagnetic force, Gravity |
| Symbol | b |
| Antiparticle | Bottom antiquark ( b ) |
| Theorized | Makoto Kobayashi and Toshihide Maskawa (1973) |
| Discovered | Leon M. Lederman et al. (1977) |
| Mass |
4.18+0.03 −0.03 GeV/c2 (1S scheme) |
| Decays into |
Charm quark, or up quark |
| Electric charge | −1/3 e |
| Color charge | Yes |
| Spin | 1/2 |
| Weak isospin | LH: −1/2, RH: 0 |
| Weak hypercharge | LH: 1/3, RH: −2/3 |
4.18+0.03
−0.03 GeV/c2 (MS scheme)
Charm quark, or
The bottom quark or b quark, also known as the beauty quark, is a third-generation quark with a charge of −1/3 e.
All quarks are described in a similar way by electroweak and quantum chromodynamics, but the bottom quark has exceptionally low rates of transition to lower-mass quarks. The bottom quark is also notable because it is a product in almost all top quark decays, and is a frequent decay product of the Higgs boson.
The bottom quark was first described theoretically in 1973 by physicists Makoto Kobayashi and Toshihide Maskawa to explain CP violation. The name "bottom" was introduced in 1975 by Haim Harari.
The bottom quark was discovered in 1977 by the Fermilab E288 experiment team led by Leon M. Lederman, when collisions produced bottomonium. Kobayashi and Maskawa won the 2008 Nobel Prize in Physics for their explanation of CP-violation.
...
Wikipedia