$B\to {\eta }^{\prime }{X}_s$ in the Standard Model

Abstract

We study $B\to {\eta }^{\prime }{X}_s$ within the framework of the Standard Model. Several mechanisms such as $b\to {\eta }^{\prime }sg$ from the QCD anomaly, and $b\to {\eta }^{\prime }s$ and $B\to {\eta }^{\prime }s\bar{q}$ from four-quark operators are treated simultaneously. We find that the first mechanism give a significant contribution to the branching ratio for $B\to {\eta }^{\prime }{X}_s$, while the other two mechanisms account for about 15% of the experimental value. The Standard Model prediction for $B\to {\eta }^{\prime }{X}_s$ is consistent with the CLEO data.

Comments: Corrected a few minor typos. 6 page with 1 figure. Sprocl.Sty. Talk presented at the Workshop on CP Violation, Adelaide, Australia, 3-6 July, 1998