$
2050 {}^{+30}_{-24} {}^{+75}_{-26}
$
|
250+36-30+181-164
|
|
1 |
|
BES3 |
$
2103 \pm50
$
|
187+-75
|
586 |
2 |
|
DM2 |
1
From a partial wave analysis of ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \phi}}{{\mathit \phi}}$ , for which the primary signal is ${{\mathit \eta}{(2225)}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \phi}}$ , and that also finds significant signals for for ${}^{}0{}^{-+}$ 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).
|
2
ASTON 1981B sees no peak, has 850 events in Ajinenko+Barth bins. ARESTOV 1980 sees no peak.
|
|