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.
@article{arxiv.1209.3480,
title = {An alternative interpretation of Belle data on \gamma-\gamma -> \eta'-\pi^+-\pi^-},
author = {D. V. Bugg},
journal= {arXiv preprint arXiv:1209.3480},
year = {2015}
}