LIGHT UNFLAVORED MESONS
($\boldsymbol S$ = $\boldsymbol C$ = $\boldsymbol B$ = 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 search

${{\boldsymbol \pi}{(1300)}}$ $I^G(J^{PC})$ = $1^-(0^{- +})$

${{\mathit \pi}}$(1300) MASS

$1300 \pm100$ MeV

${{\mathit \pi}}$(1300) WIDTH

$200\text{ to }600 $ MeV

Decay Modes

$\Gamma_{1}$

${{\mathit \rho}}{{\mathit \pi}}$

seen

404

$\Gamma_{2}$

${{\mathit \pi}}{({\mathit \pi}{\mathit \pi})_{{\mathit S}-{\text{wave}}}}$

seen

$\Gamma_{3}$

${{\mathit \gamma}}{{\mathit \gamma}}$

650