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arXiv · 2602.14906

Strange Quark Electric Dipole Moment withTopological Anomalies

Chao-Qiang Geng·Xiang-Nan Jin·Chia-Wei Liu·Bin Wu
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Abstract

We introduce an anomaly-based framework to probe quark electric dipole moments in exclusive hadronic final states produced in $e^+e^-$ annihilation. Chern-Simons-induced anomalous couplings yield a clean T-odd asymmetry $A_T$ from interference between the Standard-Model amplitude and dipole-moment contributions. As an application, $\gamma^\ast\to K^+K^-\pi^0$ provides direct sensitivity to the strange-quark EDM $d_s$ in the chiral limit. The precision on $d_s$ can reach $\mathcal{O}(10^{-16})\,e\cdot\mathrm{cm}$ with existing CMD--3 data and $\mathcal{O}(10^{-18})\,e\cdot\mathrm{cm}$ using current $J/\psi$ samples at BESIII, improving the current direct constraint from hyperon EDM by two to three orders.

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Chao-Qiang Geng, Xiang-Nan Jin, Chia-Wei Liu, Bin Wu. 2026-02-16. Strange Quark Electric Dipole Moment withTopological Anomalies. https://arxiv.org/abs/2602.14906

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