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 search

#### ${{\boldsymbol a}_{{1}}{(1260)}}$

$I^G(J^{PC})$ = $1^-(1^{+ +})$
See also our review under the ${{\mathit a}_{{1}}{(1260)}}$ in PDG 2006 , Journal of Physics G33 1 (2006).
 ${{\mathit a}_{{1}}{(1260)}}$ MASS $1230 \pm40$ MeV
 ${{\mathit a}_{{1}}{(1260)}}$ WIDTH $250\text{ to }600$ MeV
 ${\mathit D}{\mathrm -wave}/{\mathit S}{\mathrm -wave}$ AMPLITUDE RATIO IN DECAY OF ${{\mathit a}_{{1}}{(1260)}}$ $\rightarrow$ ${{\mathit \rho}}{{\mathit \pi}}$ $-0.062 \pm0.020$  (S = 2.3)
 $\Gamma_{1}$ 3 ${{\mathit \pi}}$ seen 577
 $\Gamma_{2}$ ( ${{\mathit \rho}}{{\mathit \pi}}$) $_{\mathit S{\mathrm {-wave}}}$ , ${{\mathit \rho}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ seen 353
 $\Gamma_{3}$ ( ${{\mathit \rho}}{{\mathit \pi}}$) $_{\mathit D{\mathrm {-wave}}}$ , ${{\mathit \rho}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ seen 353
 $\Gamma_{4}$ ( ${{\mathit \rho}{(1450)}}{{\mathit \pi}}$) $_{\mathit S{\mathrm {-wave}}}$ , ${{\mathit \rho}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ seen -1
 $\Gamma_{5}$ ( ${{\mathit \rho}{(1450)}}{{\mathit \pi}}$) $_{\mathit D{\mathrm {-wave}}}$ , ${{\mathit \rho}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ seen -1
 $\Gamma_{6}$ ${{\mathit f}_{{0}}{(500)}}{{\mathit \pi}}$ , ${{\mathit f}_{{0}}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ seen
 $\Gamma_{7}$ ${{\mathit f}_{{0}}{(980)}}{{\mathit \pi}}$ , ${{\mathit f}_{{0}}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ not seen 179
 $\Gamma_{8}$ ${{\mathit f}_{{0}}{(1370)}}{{\mathit \pi}}$ , ${{\mathit f}_{{0}}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ seen -1
 $\Gamma_{9}$ ${{\mathit f}_{{2}}{(1270)}}{{\mathit \pi}}$ , ${{\mathit f}_{{2}}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ seen -1
 $\Gamma_{10}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ seen 576
 $\Gamma_{11}$ ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$ not seen 577
 $\Gamma_{12}$ ${{\mathit K}}{{\mathit K}}{{\mathit \pi}}$ seen 250
 $\Gamma_{13}$ ${{\mathit K}^{*}{(892)}}{{\mathit K}}$ seen -1
 $\Gamma_{14}$ ${{\mathit \pi}}{{\mathit \gamma}}$ seen 608
 FOOTNOTES