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

${{\boldsymbol f}_{{1}}{(1420)}}$ $I^G(J^{PC})$ = $0^+(1^{+ +})$ 

See the review on "Pseudoscalar and Pseudovector Mesons in the 1400 MeV Region."
${{\mathit f}_{{1}}{(1420)}}$ MASS   $1426.3 \pm0.9$ MeV (S = 1.1)
${{\mathit f}_{{1}}{(1420)}}$ WIDTH   $54.5 \pm2.6$ MeV 
$\Gamma_{1}$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$  seen 438
$\Gamma_{2}$ ${{\mathit K}}{{\overline{\mathit K}}^{*}{(892)}}$ + c.c.  seen 163
$\Gamma_{3}$ ${{\mathit \eta}}{{\mathit \pi}}{{\mathit \pi}}$  possibly seen 573
$\Gamma_{4}$ ${{\mathit a}_{{0}}{(980)}}{{\mathit \pi}}$  358
$\Gamma_{5}$ ${{\mathit \pi}}{{\mathit \pi}}{{\mathit \rho}}$  454
$\Gamma_{6}$ 4 ${{\mathit \pi}}$  648
$\Gamma_{7}$ ${{\mathit \rho}^{0}}{{\mathit \gamma}}$  502
$\Gamma_{8}$ ${{\mathit \phi}}{{\mathit \gamma}}$  seen 349