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

${{\boldsymbol \phi}{(1680)}}$ $I^G(J^{PC})$ = $0^-(1^{- -})$ 

${{\boldsymbol \phi}{(1680)}}$ MASS
${{\mathit e}^{+}}{{\mathit e}^{-}}$ PRODUCTION   $1680 \pm20$ MeV 
PHOTOPRODUCTION
${{\mathit p}}{{\overline{\mathit p}}}$ ANNIHILATION
${{\boldsymbol \phi}{(1680)}}$ WIDTH
${{\mathit e}^{+}}{{\mathit e}^{-}}$ PRODUCTION   $150 \pm50$ MeV 
PHOTOPRODUCTION
${{\mathit p}}{{\overline{\mathit p}}}$ ANNIHILATION
$\Gamma_{1}$ ${{\mathit K}}{{\overline{\mathit K}}^{*}{(892)}}$ + c.c. seen462
$\Gamma_{2}$ ${{\mathit K}_S^0}$ ${{\mathit K}}{{\mathit \pi}}$ seen621
$\Gamma_{3}$ ${{\mathit K}}{{\overline{\mathit K}}}$ seen680
$\Gamma_{4}$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$ 677
$\Gamma_{5}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ seen840
$\Gamma_{6}$ ${{\mathit \omega}}{{\mathit \pi}}{{\mathit \pi}}$ not seen623
$\Gamma_{7}$ ${{\mathit \phi}}{{\mathit \pi}}{{\mathit \pi}}$ 482
$\Gamma_{8}$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ seen544
$\Gamma_{9}$ ${{\mathit \eta}}{{\mathit \phi}}$ seen290
$\Gamma_{10}$ ${{\mathit \eta}}{{\mathit \gamma}}$ seen751
$\Gamma_{11}$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{0}}$ 623