Axion-like particles resolve the $B \to \pi K$ and g-2 anomalies

TL;DR

This paper proposes that axion-like particles mixing with the neutral pion can simultaneously resolve discrepancies in B meson decay measurements and the anomalous magnetic moments of electrons and muons, offering a unified solution.

Contribution

It introduces a novel ALP-based mechanism that addresses both B decay anomalies and g-2 discrepancies, linking flavor physics and magnetic moment puzzles.

Findings

ALP mixing with π^0 can explain B→πK decay inconsistencies.

ALP interactions account for electron and muon g-2 anomalies.

Unified explanation connects flavor physics and magnetic moment anomalies.

Abstract

We offer a new solution to an old puzzle in the penguin-dominated $B\to\pi K$ decays. The puzzle is the inconsistency among the measurements of the branching ratios and CP asymmetries of the four $B\to\pi K$ decays: $B^+ \to \pi^+ K^0$, $B^+\to \pi^0 K^+$, $B_d^0\to\pi^- K^+$, $B_d^0\to\pi^0 K^0$. We solve the $B\to\pi K$ puzzle by considering the effect of an axion-like particle (ALP) that mixes with the $\pi^0$ and has mass close to the $\pi^0$ mass. We show that the ALP can also explain the anomalies in the electron and muon anomalous magnetic moments.