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

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

2004-02-26

arxiv.org/abs/hep-ph/0402273v5

Phys.Rev.D70:057501,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

Published version

Scientific paper

10.1103/PhysRevD.70.057501

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 $b \to s \ell^+ \ell^-$.

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