Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
; CCAST, World Lab, Beijing 100080, Peoples R China
The momentum distribution for the eta' meson produced through the inclusive decay B --> eta'X is investigated under two decay mechanisms: b-->eta's and b-->eta'sg. Although these two mechanisms can explain the recently observed decay rate of B-->eta'X, the momentum spectra for the eta' meson predicted by them are significantly different. Thus a detailed experiment is proposed to distinguish the two cases.