#### ${{\mathit \eta}{(2225)}}$ WIDTH

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
 $\bf{ 185 {}^{+40}_{-20}}$ OUR AVERAGE
$185$ ${}^{+12}_{-14}$ ${}^{+43}_{-17}$ 1
 2016 N
BES3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$190$ $\pm30$ ${}^{+60}_{-40}$ $196$ $\pm19$
 2008 I
BES ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit K}_S^0}$ ${{\mathit K}_L^0}$
$150$ ${}^{+300}_{-60}$ $\pm60$
 1990 B
MRK3 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$\sim{}\text{ 80}$
 1986 B
DM2 ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
 1 From a partial wave analysis of ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \phi}}{{\mathit \phi}}$ that also finds significant signals for for ${{\mathit \eta}{(2100)}}$ , ${}^{}0{}^{-+}$ phase space, ${{\mathit f}_{{0}}{(2100)}}$ , ${{\mathit f}_{{2}}{(2010)}}$ , ${{\mathit f}_{{2}}{(2300)}}$ , ${{\mathit f}_{{2}}{(2340)}}$ , and a previously unseen ${}^{}0{}^{-+}$ state ${{\mathit X}{(2500)}}$ (M = $2470$ ${}^{+15}_{-19}{}^{+101}_{-23}$ MeV, $\Gamma$ = $230$ ${}^{+64}_{-35}{}^{+56}_{-33}$ MeV).
References:
 ABLIKIM 2016N
PR D93 112011 Observation of Pseudoscalar and tensor Resonances in ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \phi}}{{\mathit \phi}}$
 ABLIKIM 2008I
PL B662 330 Partial Wave Analysis of ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \phi}}{{\mathit \phi}}$
 BAI 1990B
PRL 65 1309 Observation of a Pseudoscalar State in ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \phi}}{{\mathit \phi}}$ near ${{\mathit \phi}}$ ${{\mathit \phi}}$ Threshold
 BISELLO 1986B
PL B179 294 Search of Glueballs in the ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \phi}}{{\mathit \phi}}$ Decay