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

${{\boldsymbol f}_{{2}}{(1640)}}$ $I^G(J^{PC})$ = $0^+(2^{+ +})$ 

${{\mathit f}_{{2}}{(1640)}}$ MASS   $1639 \pm6$ MeV (S = 1.2)
${{\mathit f}_{{2}}{(1640)}}$ WIDTH   $99 {}^{+60}_{-40}$ MeV (S = 2.9)
$\Gamma_{1}$ ${{\mathit \omega}}{{\mathit \omega}}$ seen243
$\Gamma_{2}$ 4 ${{\mathit \pi}}$ seen763
$\Gamma_{3}$ ${{\mathit K}}{{\overline{\mathit K}}}$ seen654