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

${{\boldsymbol f}_{{2}}{(1270)}}$ $I^G(J^{PC})$ = $0^+(2^{+ +})$ 

${{\mathit f}_{{2}}{(1270)}}$ MASS   $1275.5 \pm0.8$ MeV 
${{\mathit f}_{{2}}{(1270)}}$ WIDTH   $186.7 {}^{+2.2}_{-2.5}$ MeV (S = 1.4)
Helicity-0/Helicity-2 RATIO IN ${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit f}_{{2}}{(1270)}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$   $0.037 {}^{+0.160}_{-0.029}$  
$\Gamma_{1}$ ${{\mathit \pi}}{{\mathit \pi}}$ $(84.2^{+2.9}_{-0.9})\%$S=1.1 623
$\Gamma_{2}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$ $(7.7^{+1.1}_{-3.2})\%$S=1.2 563
$\Gamma_{3}$ ${{\mathit K}}{{\overline{\mathit K}}}$ $(4.6^{+0.5}_{-0.4})\%$S=2.7 404
$\Gamma_{4}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$ $(2.8\pm{0.4})\%$S=1.2 560
$\Gamma_{5}$ ${{\mathit \eta}}{{\mathit \eta}}$ $(4.0\pm{0.8})\times 10^{-3}$S=2.1 326
$\Gamma_{6}$ 4 ${{\mathit \pi}^{0}}$ $(3.0\pm{1.0})\times 10^{-3}$S=1.0 565
$\Gamma_{7}$ ${{\mathit \gamma}}{{\mathit \gamma}}$ $(1.42\pm{0.24})\times 10^{-5}$S=1.4 638
$\Gamma_{8}$ ${{\mathit \eta}}{{\mathit \pi}}{{\mathit \pi}}$ $<8\times 10^{-3}$CL=95%478
$\Gamma_{9}$ ${{\mathit K}^{0}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ + c.c. $<3.4\times 10^{-3}$CL=95%293
$\Gamma_{10}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $<6\times 10^{-10}$CL=90%638
    constrained fit information