# ${{\boldsymbol f}_{{J}}{(2220)}}$ MASS INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 2231.1 \pm3.5}$ OUR AVERAGE
$2235$ $\pm4$ $\pm6$ 74
 1996 B
BES ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$2230$ ${}^{+6}_{-7}$ $\pm16$ 46
 1996 B
BES ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$2232$ ${}^{+8}_{-7}$ $\pm15$ 23
 1996 B
BES ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$
$2235$ $\pm4$ $\pm5$ 32
 1996 B
BES ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit p}}{{\overline{\mathit p}}}$
$2209$ ${}^{+17}_{-15}$ $\pm10$
 1988 F
LASS 11 ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \Lambda}}$
$2230$ $\pm20$
 1988
SPEC 40 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit n}}$
$2220$ $\pm10$ 41 1
 1986 B
GA24 38$-$100 ${{\mathit \pi}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit n}}{{\mathit \eta}}{{\mathit \eta}^{\,'}}$
$2230$ $\pm6$ $\pm14$ 93
 1986 D
MRK3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$2232$ $\pm7$ $\pm7$ 23
 1986 D
MRK3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}_S^0}$ ${{\mathit K}_S^0}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$2223.9$ $\pm2.5$ 2
 2008
SPEC 40 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit n}}$ +m${{\mathit \pi}^{0}}$
$2246$ $\pm36$
 1998 H
BES ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
1  ALDE 1986B uses data from both the GAMS-2000 and GAMS-4000 detectors.
2  $\mathit J{}^{PC} = 2{}^{++}$. Systematic uncertainties not evaluated
References:
PRL 81 1179 Experimental Study of ${{\mathit J / \psi}}$ Radiative Decay to ${{\mathit \pi}^{0}}{{\mathit \pi}^{0}}$
PRL 76 3502 Studies of ${{\mathit \xi}{(2230)}}$ in ${{\mathit J / \psi}}$ Radiative Decays
PL B215 199 Evidence for a $\mathit J{}^{PC} = 4++$ ${{\mathit K}}{{\overline{\mathit K}}}$ State at 2.2 ${\mathrm {GeV/}}\mathit c{}^{2}$ from ${{\mathit K}^{-}}{{\mathit p}}$ Interaction at 11 ${\mathrm {GeV/}}\mathit c$
NP B309 426 ${{\mathit \theta}{(1700)}}$ and ${{\mathit \xi}{(2230)}}$ Resonances in the ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit n}}$ Reaction at Momentum 40 ${\mathrm {GeV/}}\mathit c$
PL B177 120 2.22 GeV ${{\mathit \eta}}{{\mathit \eta}^{\,'}}$ Structure Observed in 38 and 100 ${\mathrm {GeV/}}\mathit c$ ${{\mathit \pi}^{-}}{{\mathit p}}$ Collisions
PRL 56 107 Observation of a Narrow ${{\mathit K}}{{\overline{\mathit K}}}$ State in ${{\mathit J / \psi}}$ Radiative Decays