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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

${{\mathit \rho}{(1900)}}$ $I^G(J^{PC})$ = $1^+(1^{- -})$

See the review on "Spectroscopy of Light Meson Resonances."

${{\mathit \rho}{(1900)}}$ MASS

${{\mathit \rho}{(1900)}}$ WIDTH

${{\mathit \rho}{(1900)}}$ Decay Modes
Mode   Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/ Conf. Level P(MeV/c)   $\Gamma_{1}$ 6 ${{\mathit \pi}}$   seen     $\Gamma_{2}$ 3 ${{\mathit \pi}^{+}}$3 ${{\mathit \pi}^{-}}$   seen     $\Gamma_{3}$ 2 ${{\mathit \pi}^{+}}$2 ${{\mathit \pi}^{-}}$2 ${{\mathit \pi}^{0}}$       $\Gamma_{4}$ ${{\mathit \phi}}{{\mathit \pi}}$       $\Gamma_{5}$ hadrons   seen     $\Gamma_{6}$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$   seen     $\Gamma_{7}$ ${{\overline{\mathit N}}}{{\mathit N}}$   not seen
FOOTNOTES