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  (beta) PDGID:
M082

${{\mathit f}_{{J}}{(2220)}}$

$I^G(J^{PC})$ = $0^+(2{}^{++}~or~4^{+ +})$ 
Needs confirmation. See our mini-review in the 2004 edition of this $\mathit Review$, PDG 2004 .
${{\mathit f}_{{J}}{(2220)}}$ MASS   $2231.1 \pm3.5$ MeV 
 
${{\mathit f}_{{J}}{(2220)}}$ WIDTH   $23 {}^{+8}_{-7}$ MeV 
 
$\Gamma_{1}$ ${{\mathit \pi}}{{\mathit \pi}}$   not seen 1107
 
$\Gamma_{2}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$   not seen 1107
 
$\Gamma_{3}$ ${{\mathit K}}{{\overline{\mathit K}}}$   not seen 1000
 
$\Gamma_{4}$ ${{\mathit p}}{{\overline{\mathit p}}}$   not seen 603
 
$\Gamma_{5}$ ${{\mathit \gamma}}{{\mathit \gamma}}$   not seen 1116
 
$\Gamma_{6}$ ${{\mathit \eta}}{{\mathit \eta}^{\,'}{(958)}}$   seen 809
 
$\Gamma_{7}$ ${{\mathit \phi}}{{\mathit \phi}}$   not seen 453
 
$\Gamma_{8}$ ${{\mathit \eta}}{{\mathit \eta}}$   not seen 972
 
FOOTNOTES