Momentum Spectrum of ${\eta }^{\prime }$ Meson in the Inclusive Decay $B\to {\eta }^{\prime }{X}_s$

Abstract

The momentum distribution for the ${\eta }^{\prime }$ meson produced through the inclusive decay $B\to {\eta }^{\prime }X$ is investigated under two decay mechanisms, $b\to {\eta }^{\prime }s$ and $b\to {\eta }^{\prime }sg$. Although all these two mechanisms can explain the recently observed decay rate of $B\to {\eta }^{\prime }X$, the momentum spectrums for ${\eta }^{\prime }$ meson predicted by them are strongly different. Thus detailed experiment is proposed to distinguish the two cases.

7 pages, 1 figure in PS file(not changed), minor words corrections, to appear in Phys. Rev. D, Rapid Communications