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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: 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   $141 \pm40$ MeV

${{\mathit f}_{{{2}}}{(1910)}}$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ MODE

Decay Modes
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$   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