Towards New Frontiers with $B\to \pi K$ Decays

Abstract

Exploring correlations between the CP asymmetries of $B_d^0\to {\pi }^0{K}_{\mathrm{S}}$ following from an isospin relation, we uncover new tensions with the Standard Model in data for neutral $B\to \pi K$ decays. Should this intriguing picture originate from New Physics, a modified electroweak penguin sector provides a key scenario. It includes models with extra $Z^{\prime }$ bosons, which offer attractive ways to resolve anomalies in $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ measurements. We present a new strategy to reveal the underlying physics, apply it to current $B\to \pi K$ data, and discuss the excellent prospects for Belle II.

7 pages, 3 figures

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Cited by in corpus (13)

• $Z^{\prime }$ models with less-minimal flavour violation
• Anomalies in Particle Physics
• Correlating ${\epsilon }^{\prime }/\epsilon$ to hadronic $B$ decays via $U(2{)}^3$ flavour symmetry
• Exploring $B\to \pi \pi ,\pi K$ Decays at the High-Precision Frontier
• A unified explanation of $b\to s{\mu }^{+}{\mu }^{-}$ anomalies, neutrino masses and $B\to \pi K$ puzzle
• Measurement of CP violation in the decay $B^{+}\to K^{+}{\pi }^0$
• Axion-like particles resolve the $B\to \pi K$ and g-2 anomalies
• Zooming into CP violation in $B_{(s)}\to hh$ Decays
• Measurement of $CP$ violation in $B^0\to K_S^0{\pi }^0$ decays at Belle II
• Rare nonleptonic ${\bar{B}}_s^0$ decays as probes of new physics behind $b\to s\mu \bar{\mu }$ anomalies
• Complete analysis of all $B\to \pi K$ decays
• Estimates of the isospin-violating ${\Lambda }_b\to {\Sigma }^0\varphi ,{\Sigma }^{0}J/\psi$ decays and the $\Sigma -\Lambda$ mixing
• Estimating QCD-factorization amplitudes through $SU(3)$ symmetry in $B\to PP$ decays