LIGHT UNFLAVORED MESONS
($\mathit S$ = $\mathit C$ = $\mathit B$ = $\mathit{0}$)
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

${{\mathit \eta}_{{{2}}}{(1645)}}$ $I^G(J^{PC})$ = $0^+(2^{- +})$ 

${{\mathit \eta}_{{{2}}}{(1645)}}$ MASS   $1617 \pm5$ MeV 
${{\mathit \eta}_{{{2}}}{(1645)}}$ WIDTH   $181 \pm11$ MeV 
$\Gamma_{1}$ ${{\mathit a}_{{{2}}}{(1320)}}{{\mathit \pi}}$  seen 242
$\Gamma_{2}$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$  seen 580
$\Gamma_{3}$ ${{\mathit K}^{*}}{{\overline{\mathit K}}}$  seen 404
$\Gamma_{4}$ ${{\mathit \eta}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$  seen 685
$\Gamma_{5}$ ${{\mathit a}_{{{0}}}{(980)}}{{\mathit \pi}}$  seen 499
$\Gamma_{6}$ ${{\mathit f}_{{{2}}}{(1270)}}{{\mathit \eta}}$  not seen -1