The effects of enhanced Z penguins on lepton polarizations in $B\to X_s{\ell }^{+}{\ell }^{-}$

Abstract

The sensitivity of the $B\to \pi K$ mode to electroweak penguins and the recent experimental data for the $B\to \pi \pi$, $\pi K$ modes has given rise to what is known as the ``$B\to \pi K$ puzzle''. Recently it has been observed that this {\sl puzzle} can be resolved by considering the new physics which can enter via $Z^0$ penguins. In this note we analyze the effect of this enhanced $Z^0$ penguins on the lepton polarization asymmetries of $b\to s{\ell }^{+}{\ell }^{-}$.

Comments: Published version