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:
M164

${{\mathit \pi}_{{{1}}}{(1600)}}$

$I^G(J^{PC})$ = $1^-(1^{- +})$ 
Coupled channel analyses favor the existence of only one broad ${}^{}1{}^{-+}$ isovector state consistent with ${{\mathit \pi}_{{{1}}}{(1600)}}$ in the $1400 - 1600$ MeV region. Accordingly, the ${{\mathit \pi}_{{{1}}}{(1400)}}$ entries of the previous Reviews have been moved into this section. See the review on "Spectroscopy of Light Meson Resonances."
${{\mathit \pi}_{{{1}}}{(1600)}}$ T-Matrix Pole $\sqrt {s }$ $(1480 - 1680) - i (150 - 300)$ MeV 
 
${{\mathit \pi}_{{{1}}}{(1600)}}$ MASS (${{\mathit \eta}}{{\mathit \pi}}$ mode) $1354$ $\pm25$ MeV (S = 1.8)
 
${{\mathit \pi}_{{{1}}}{(1600)}}$ MASS (non-${{\mathit \eta}}{{\mathit \pi}}$ mode) $1645^{+40}_{-17}$ MeV (S = 1.3)
 
${{\mathit \pi}_{{{1}}}{(1600)}}$ WIDTH (${{\mathit \eta}}{{\mathit \pi}}$ mode) $330$ $\pm35$ MeV 
 
${{\mathit \pi}_{{{1}}}{(1600)}}$ WIDTH (non-${{\mathit \eta}}{{\mathit \pi}}$ mode) $370^{+50}_{-60}$ MeV 
 
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{1}$ ${{\mathit \pi}}{{\mathit \pi}}{{\mathit \pi}}$ seen 795
 
$\Gamma_{2}$ ${{\mathit \rho}^{0}}{{\mathit \pi}^{-}}$ seen 631
 
$\Gamma_{3}$ ${{\mathit f}_{{{2}}}{(1270)}}{{\mathit \pi}^{-}}$ not seen 304
 
$\Gamma_{4}$ ${{\mathit b}_{{{1}}}{(1235)}}{{\mathit \pi}}$ seen 343
 
$\Gamma_{5}$ ${{\mathit \eta}^{\,'}{(958)}}{{\mathit \pi}^{-}}$ seen 532
 
$\Gamma_{6}$ ${{\mathit \eta}}{{\mathit \pi}}$ seen 725
 
$\Gamma_{7}$ ${{\mathit f}_{{{1}}}{(1285)}}{{\mathit \pi}}$ seen 300