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

${{\boldsymbol f}_{{0}}{(2200)}}$ $I^G(J^{PC})$ = $0^+(0^{+ +})$ 

Seen in ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ (AUGUSTIN 1988 ), ${{\mathit K}^{+}}{{\mathit K}^{-}}$ (ABLIKIM 2005Q) and ${{\mathit \eta}}{{\mathit \eta}}$ (BINON 2005 ) system. Not seen in ${{\mathit \Upsilon}{(1S)}}$ radiative decays (BARU 1989 ).
${{\mathit f}_{{0}}{(2200)}}$ MASS   $2187 \pm14$ MeV 
${{\mathit f}_{{0}}{(2200)}}$ WIDTH   $207 \pm40$ MeV