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

${{\mathit a}_{{{0}}}{(1710)}}$ $I^G(J^{PC})$ = $1^-(0^{+ +})$

Evidence for this state is also inferred from the interference of the ${{\mathit K}^{+}}{{\mathit K}^{-}}$ and ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ decays of the ${{\mathit f}_{{{0}}}{(1710)}}$ in ${{\mathit D}_{{{s}}}^{+}}$ $\rightarrow$ ${{\mathit f}_{{{0}}}{(1710)}}{{\mathit \pi}^{+}}$, leading to a relative branching ratio an order of magnitude larger than expected from isospin symmetry (ABLIKIM 2022F). See also the review on "Spectroscopy of Light Meson Resonances."

${{\mathit a}_{{{0}}}{(1710)}}$ MASS

$1713 \pm19$ MeV (S = 3.8)

${{\mathit a}_{{{0}}}{(1710)}}$ WIDTH

$107 \pm15$ MeV

${{\boldsymbol a}_{{{0}}}{(1710)}}$ DECAY MODES