LIGHT UNFLAVORED MESONS
($\mathit S$ = $\mathit C$ = $\mathit B$ = $\mathit{0}$)
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

${{\mathit f}_{{{2}}}{(1910)}}$ $I^G(J^{PC})$ = $0^+(2^{+ +})$

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