1209.3480 (D. V. Bugg)

An alternative interpretation of Belle data on γ-γ->
η'-π^+-π^-    [PDF]

D. V. Bugg

Belle data on gamma-gamma -> eta'-pi-pi are refitted using a broad J^{PC}=0^(-+) signal peaking in the mass range 2250-2300 MeV, but without \eta (1760). There is the possibility that this broad 0^(-+) signal may be identified with the 0^(-+) glueball predicted originally by Morningstar and Peardon. The X(1835) is confirmed to have a resonant phase variation.

View original: http://arxiv.org/abs/1209.3480