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

Abstract

The experimental hint of large $B\to \etap + X_s$ could be linked to the $b\to s$ penguins via the gluon anomaly. If running $\alpha_s$ is used in the $\etap$-$g$-$g$ coupling, the standard $b\to sg^*$ penguin alone may not be enough, calling for the need of dipole $b\to sg$ from new physics. The latter could be at 10% level as suggested by charm counting and ${\cal B}_{s.l.}$ problems. The added new physics contribution not only brings about sufficent rate, it could lead to CP asymmetries at 10% level, which could be observed soon at B Factories.