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:
M027

${{\mathit \eta}{(1405)}}$

$I^G(J^{PC})$ = $0^+(0^{- +})$ 
See also the ${{\mathit \eta}{(1475)}}$.
Expand/Collapse All
▸  ${{\mathit \eta}{(1405)}}$ MASS
▸  ${{\mathit \eta}{(1405)}}$ WIDTH
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{1}$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit \pi}}$ seen 424
 
$\Gamma_{2}$ ${{\mathit \eta}}{{\mathit \pi}}{{\mathit \pi}}$ seen 562
 
$\Gamma_{3}$ ${{\mathit a}_{{{0}}}{(980)}}{{\mathit \pi}}$ seen 344
 
$\Gamma_{4}$ ${{\mathit \eta}}{({\mathit \pi}{\mathit \pi})_{{{\mathit S}-{\text{wave}}}}}$ seen  
 
$\Gamma_{5}$ ${{\mathit f}_{{{0}}}{(980)}}{{\mathit \pi}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$  
 
$\Gamma_{6}$ ${{\mathit f}_{{{0}}}{(980)}}{{\mathit \eta}}$ seen -1
 
$\Gamma_{7}$ 4 ${{\mathit \pi}}$ seen 638
 
$\Gamma_{8}$ ${{\mathit \rho}}{{\mathit \rho}}$ <58 $\%$ CL=99% -1
 
$\Gamma_{9}$ ${{\mathit \gamma}}{{\mathit \gamma}}$ 704
 
$\Gamma_{10}$ ${{\mathit \rho}^{0}}{{\mathit \gamma}}$ seen 491
 
$\Gamma_{11}$ ${{\mathit \phi}}{{\mathit \gamma}}$ 335
 
$\Gamma_{12}$ ${{\mathit K}^{*}{(892)}}{{\mathit K}}$ seen 122
 
[1] Our estimate. See the Particle Listings for details.