pdgLive Home   >   LIGHT UNFLAVORED MESONS ($\mathit S$ = $\mathit C$ = $\mathit B$ = 0)   >   ${{\mathit f}_{{{4}}}{(2050)}}$

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: M016

${{\mathit f}_{{{4}}}{(2050)}}$ $I^G(J^{PC})$ = $0^+(4^{+ +})$

${{\mathit f}_{{{4}}}{(2050)}}$ MASS $2018$ $\pm11$ MeV (S = 2.1)

${{\mathit f}_{{{4}}}{(2050)}}$ WIDTH $237$ $\pm18$ MeV (S = 1.9)

${{\mathit f}_{{{4}}}{(2050)}}$ DECAY MODES

Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ ${{\mathit \omega}}{{\mathit \omega}}$ seen 637   $\Gamma_{2}$ ${{\mathit \pi}}{{\mathit \pi}}$ ($17.0$ $\pm1.5$ ) $\%$ 1000   $\Gamma_{3}$ ${{\mathit K}}{{\overline{\mathit K}}}$ ($6.8^{+3.4}_{-1.8}$) $ \times 10^{-3}$ 880   $\Gamma_{4}$ ${{\mathit \eta}}{{\mathit \eta}}$ ($2.1$ $\pm0.8$) $ \times 10^{-3}$ 848   $\Gamma_{5}$ 4 ${{\mathit \pi}^{0}}$ <1.2 $\%$ 964   $\Gamma_{6}$ ${{\mathit \gamma}}{{\mathit \gamma}}$ seen 1009   $\Gamma_{7}$ ${{\mathit a}_{{{2}}}{(1320)}}{{\mathit \pi}}$ seen 567