Today in ISR I spent my time studying quarkonium.
|
Name |
Composition |
Statistics |
Spin |
Mass (MeV/c2) |
Charge |
|
J/Psi Meson |
cc (charmonium) |
Bosonic |
+1 |
3096.9 |
0 |
|
Upsilon Meson |
bb (bottomonium) |
Bosonic |
+1 |
9460 |
0 |
Quarkonium is "the name given to a subatomic system composed of a heavy quark and its anti-quark partner bound by the strong interactions. There are two main types of quarkonium; charmonium (charm-anticharm) and bottomonium (bottom-antibottom). The amount of time it takes for these quarkoniums to form is between 10^-25 s and 10^-13 s.***
Some different properties of quarkonium are listed below:
- Total Spin (S)
- Orbital Angular Momentum (L)
- Total Angular Momentum: J=L+S
- Parity: (-1)^(L+1)
- Charge Conjunction Parity: (-1)^(L+S)
Tomorrow I want to continue reading on quarkonium spectroscopy and I want to research what charge conjunction parity is. I also read that quarkonium was discovered in "a narrow state decaying to e+e- and mu+mu-" and I don't fully understand what this means. I want to hopefully do some more research on this tomorrow.
***I need to fact check this as I came up with this hypothesis based on other known facts. Toponium does not exist cause top quark decay (which is 5*10^-25 s) is too fast for quarkonium to form, but since charmonium can exist, it means that quarkonium must form before charm quarks decay (which is 10^-13 s).
ryan_b
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