Exploring correlations between the CP asymmetries of Bd0→π0KS following from an isospin relation, we uncover new tensions with the Standard Model in data for neutral B→πK decays. Should this intriguing picture originate from New Physics, a modified electroweak penguin sector provides a key scenario. It includes models with extra Z′ bosons, which offer attractive ways to resolve anomalies in B→K(∗)ℓ+ℓ− measurements. We present a new strategy to reveal the underlying physics, apply it to current B→πK data, and discuss the excellent prospects for Belle II.
@article{arxiv.1712.02323,
title = {Towards New Frontiers with $B\to\pi K$ Decays},
author = {Robert Fleischer and Ruben Jaarsma and K. Keri Vos},
journal= {arXiv preprint arXiv:1712.02323},
year = {2018}
}