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 $\mathit I = 0$ (${{\mathit \eta}}$, ${{\mathit \eta}^{\,'}}$, ${{\mathit h}}$, ${{\mathit h}^{\,'}}$, ${{\mathit \omega}}$, ${{\mathit \phi}}$, ${{\mathit f}}$, ${{\mathit f}^{\,'}}$): ${\mathit {\mathit c}}_{{\mathrm {1}}}({{\mathit u}}{{\overline{\mathit u}}}$ $+$ ${{\mathit d}}{{\overline{\mathit d}}}$) $+$ ${\mathit {\mathit c}}_{{\mathrm {2}}}({{\mathit s}}{{\overline{\mathit s}}}$) 		INSPIRE   JSON PDGID:
M014

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

$I^G(J^{PC})$ = $0^+(0^{+ +})$ 

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 $\sqrt {\mathit s }$ $(400 - 550)-i(200 - 350)$ MeV 
 
${{\mathit f}_{{{0}}}{(500)}}$ BREIT-WIGNER MASS 400 to 800 MeV 
 
${{\mathit f}_{{{0}}}{(500)}}$ BREIT-WIGNER WIDTH 100 to 800 MeV 
 
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{1}$ ${{\mathit \pi}}{{\mathit \pi}}$ seen  
 
$\Gamma_{2}$ ${{\mathit \gamma}}{{\mathit \gamma}}$ seen