LIGHT UNFLAVORED MESONS
($\boldsymbol S$ = $\boldsymbol C$ = $\boldsymbol B$ = 0)
For $\mathit I = 1$ (${{\mathit \pi}}$, ${{\mathit b}}$, ${{\mathit \rho}}$, ${{\mathit a}}$): ${\mathit {\mathit u}}$ ${\mathit {\overline{\mathit d}}}$, ( ${\mathit {\mathit u}}$ ${\mathit {\overline{\mathit u}}}−$ ${\mathit {\mathit d}}$ ${\mathit {\overline{\mathit d}}})/\sqrt {2 }$, ${\mathit {\mathit d}}$ ${\mathit {\overline{\mathit u}}}$;
for $\mathit I = 0$ (${{\mathit \eta}}$, ${{\mathit \eta}^{\,'}}$, ${{\mathit h}}$, ${{\mathit h}^{\,'}}$, ${{\mathit \omega}}$, ${{\mathit \phi}}$, ${{\mathit f}}$, ${{\mathit f}^{\,'}}$): ${\mathit {\mathit c}}_{{\mathrm {1}}}$( ${{\mathit u}}{{\overline{\mathit u}}}$ $+$ ${{\mathit d}}{{\overline{\mathit d}}}$ ) $+$ ${\mathit {\mathit c}}_{{\mathrm {2}}}$( ${{\mathit s}}{{\overline{\mathit s}}}$ )
INSPIRE search

${{\boldsymbol f}_{{J}}{(2220)}}$ $I^G(J^{PC})$ = $0^+(2{}^{++}~or~4^{+ +})$ 

Needs confirmation. See our mini-review in the 2004 edition of this $\mathit Review$, PDG 2004 .
${{\mathit f}_{{J}}{(2220)}}$ MASS   $2231.1 \pm3.5$ MeV 
${{\mathit f}_{{J}}{(2220)}}$ WIDTH   $23 {}^{+8}_{-7}$ MeV 
$\Gamma_{1}$ ${{\mathit \pi}}{{\mathit \pi}}$ not seen1107
$\Gamma_{2}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ not seen1107
$\Gamma_{3}$ ${{\mathit K}}{{\overline{\mathit K}}}$ not seen1000
$\Gamma_{4}$ ${{\mathit p}}{{\overline{\mathit p}}}$ not seen603
$\Gamma_{5}$ ${{\mathit \gamma}}{{\mathit \gamma}}$ not seen1116
$\Gamma_{6}$ ${{\mathit \eta}}{{\mathit \eta}^{\,'}{(958)}}$ seen809
$\Gamma_{7}$ ${{\mathit \phi}}{{\mathit \phi}}$ not seen453
$\Gamma_{8}$ ${{\mathit \eta}}{{\mathit \eta}}$ not seen972