LIGHT UNFLAVORED MESONS($\mathit S$ = $\mathit C$ = $\mathit B$ = 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 $\mathit I = 0$ (${{\mathit \eta}}$, ${{\mathit \eta}^{\,'}}$, ${{\mathit h}}$, ${{\mathit h}^{\,'}}$, ${{\mathit \omega}}$, ${{\mathit \phi}}$, ${{\mathit f}}$, ${{\mathit f}^{\,'}}$): ${\mathit {\mathit c}}_{{\mathrm {1}}}({{\mathit u}}{{\overline{\mathit u}}}$ $+$ ${{\mathit d}}{{\overline{\mathit d}}}$) $+$ ${\mathit {\mathit c}}_{{\mathrm {2}}}({{\mathit s}}{{\overline{\mathit s}}}$)

#### ${{\mathit f}_{{{0}}}{(500)}}$

$I^G(J^{PC})$ = $0^+(0^{+ +})$

also known as ${{\mathit \sigma}}$; was ${{\mathit f}_{{{0}}}{(600)}}$, ${{\mathit f}_{{{0}}}{(400-1200)}}$
 See related review: Scalar Mesons below 1 GeV
 ${{\mathit f}_{{{0}}}{(500)}}$ T-MATRIX POLE $\sqrt {\mathit s }$ $(400 - 550)−{\mit i}(200 - 350)$ MeV
 ${{\mathit f}_{{{0}}}{(500)}}$ BREIT-WIGNER MASS $400\text{ to }800$ MeV
 ${{\mathit f}_{{{0}}}{(500)}}$ BREIT-WIGNER WIDTH $100\text{ to }800$ MeV
 $\Gamma_{1}$ ${{\mathit \pi}}{{\mathit \pi}}$ seen
 $\Gamma_{2}$ ${{\mathit \gamma}}{{\mathit \gamma}}$ seen
 FOOTNOTES