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:
M142

${{\mathit f}_{{{2}}}{(1910)}}$

$I^G(J^{PC})$ = $0^+(2^{+ +})$ 
We list here three different peaks with close masses and widths seen in the mass distributions of ${{\mathit \omega}}{{\mathit \omega}}$, ${{\mathit \eta}}{{\mathit \eta}^{\,'}}$, and ${{\mathit K}^{+}}{{\mathit K}^{-}}$ final states. ALDE 1991B argues that they are of different nature.
${{\mathit f}_{{{2}}}{(1910)}}$ MASS
see data
${{\mathit f}_{{{2}}}{(1910)}}{{\mathit \omega}}{{\mathit \omega}}$ MODE   $1900 \pm9$ MeV (S = 1.4)
 
${{\mathit f}_{{{2}}}{(1910)}}{{\mathit \eta}}{{\mathit \eta}^{\,'}}$ MODE   $1934 \pm16$ MeV 
 
${{\mathit f}_{{{2}}}{(1910)}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ MODE
${{\mathit f}_{{{2}}}{(1910)}}$ WIDTH
Full width $\Gamma $
${{\mathit f}_{{{2}}}{(1910)}}{{\mathit \omega}}{{\mathit \omega}}$ MODE   $167 \pm21$ MeV (S = 1.3)
 
${{\mathit f}_{{{2}}}{(1910)}}{{\mathit \eta}}{{\mathit \eta}^{\,'}}$ MODE   $140 \pm40$ MeV 
 
${{\mathit f}_{{{2}}}{(1910)}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ MODE
$\Gamma_{1}$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$   940
 
$\Gamma_{2}$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$   seen 812
 
$\Gamma_{3}$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$   809
 
$\Gamma_{4}$ ${{\mathit \eta}}{{\mathit \eta}}$   seen 776
 
$\Gamma_{5}$ ${{\mathit \omega}}{{\mathit \omega}}$   seen 538
 
$\Gamma_{6}$ ${{\mathit \eta}}{{\mathit \eta}^{\,'}}$   seen 566
 
$\Gamma_{7}$ ${{\mathit \eta}^{\,'}}{{\mathit \eta}^{\,'}}$   -1
 
$\Gamma_{8}$ ${{\mathit \rho}}{{\mathit \rho}}$   seen 549
 
$\Gamma_{9}$ ${{\mathit a}_{{{2}}}{(1320)}}{{\mathit \pi}}$   seen 479
 
$\Gamma_{10}$ ${{\mathit f}_{{{2}}}{(1270)}}{{\mathit \eta}}$   seen 247
 
FOOTNOTES