Enhanced $b\to sg$ Decay, Inclusive ${\eta }^{\prime }$ Production, and the Gluon Anomaly

Abstract

The experimental hint of large $B\to {\eta }^{\prime }+X_s$ is linked to the $b\to s$ penguins via the gluon anomaly. Using running ${\alpha }_s$ in the ${\eta }^{\prime }$-$g$-$g$ coupling, the standard $b\to s{g}^{\ast }$ penguin alone seems insufficient, calling for the need of dipole $b\to sg$ at 10% level from new physics, which could also resolve the ${\mathcal{B}}_{s.l.}$ and charm counting problems. The intereference of standard and new physics contributions may result in direct CP asymmetries at 10% level, which could be observed soon at B Factories.

Comments: 12 pages, revtex, 3 figs. (version to appear in Phys. Rev. Lett.)