Τ–θ puzzle
| Composition |
K− : s u |
|---|---|
| Statistics | Bosonic |
| Interactions | Strong, weak, electromagnetic, gravitational |
| Symbol |
K+ , K0 , K− |
| Discovered | 1947 |
| Types | 4 |
| Mass |
K± : 493.677±0.013 MeV/c2 K0 : 497.648±0.022 MeV/c2 |
| Electric charge |
K± : ±1 e K0 : 0 e |
| Spin | 0 |
| Strangeness | 1 |
K+
:
u
s
K0
:
d
s
/
s
d
In particle physics, a kaon /ˈkeɪ.ɒn/, also called a K meson and denoted
K
, is any of a group of four mesons distinguished by a quantum number called strangeness. In the quark model they are understood to be bound states of a strange quark (or antiquark) and an up or down antiquark (or quark).
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Wikipedia