| $\bf{
\text{17 - 22}}$
|
OUR EVALUATION
|
| $20.0$ |
1 |
|
THEO |
| $18.9$ $\pm0.8$ |
2 |
|
THEO |
| $21$ |
3 |
|
THEO |
| $18$ |
4 |
|
THEO |
| $18\text{ to }23 $ |
5 |
|
THEO |
|
1
GAO 1997 uses electromagnetic mass splittings of light mesons.
|
|
2
LEUTWYLER 1996 uses a combined fit to ${{\mathit \eta}}$ $\rightarrow$ 3 ${{\mathit \pi}}$ and ${{\mathit \psi}^{\,'}}$ $\rightarrow$ ${{\mathit J / \psi}}$ (${{\mathit \pi}},{{\mathit \eta}}$) decay rates, and the electromagnetic mass differences of the ${{\mathit \pi}}$ and ${{\mathit K}}$.
|
|
3
DONOGHUE 1992 result is from a combined analysis of meson masses, ${{\mathit \eta}}$ $\rightarrow$ 3 ${{\mathit \pi}}$ using second-order chiral perturbation theory including nonanalytic terms, and ( ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit \pi}}$ )/( ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit \eta}}$ ).
|
|
4
GERARD 1990 uses large $\mathit N$ and ${{\mathit \eta}}-{{\mathit \eta}^{\,'}}$ mixing.
|
|
5
LEUTWYLER 1990B determines quark mass ratios using second-order chiral perturbation theory for the meson and baryon masses, including nonanalytic corrections. Also uses Weinberg sum rules to determine $\mathit L_{7}$.
|
