Probing Quark Electric Dipole Moment with Topological Anomalies
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911452236873728 |
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| author | Geng, Chao-Qiang Jin, Xiang-Nan Liu, Chia-Wei Wu, Bin |
| author_facet | Geng, Chao-Qiang Jin, Xiang-Nan Liu, Chia-Wei Wu, Bin |
| contents | CP-odd observables originating from the strange-quark electric dipole moment ($d_s$) are identified in $γ^\ast\to K^+K^-π^0$ and evaluated in the chiral limit. A nonzero T-odd asymmetry $A_T$ requires anomalous couplings descending from a five-dimensional Chern-Simons construction. Modeling the running of $F_A$ and $F_V$ with vector-meson dominance, we estimate sensitivities to $d_s$ at the level of $\mathcal{O}(10^{-16})\,e\cdot\mathrm{cm}$ in $e^+e^-$ data at CMD-3 and $\mathcal{O}(10^{-18})\,e\cdot\mathrm{cm}$ using existing $J/ψ$ samples at BESIII. Future experiments at the Super Tau-Charm Facility and Belle~II can further improve the reach by an order of magnitude. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_14906 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Probing Quark Electric Dipole Moment with Topological Anomalies Geng, Chao-Qiang Jin, Xiang-Nan Liu, Chia-Wei Wu, Bin High Energy Physics - Phenomenology High Energy Physics - Experiment CP-odd observables originating from the strange-quark electric dipole moment ($d_s$) are identified in $γ^\ast\to K^+K^-π^0$ and evaluated in the chiral limit. A nonzero T-odd asymmetry $A_T$ requires anomalous couplings descending from a five-dimensional Chern-Simons construction. Modeling the running of $F_A$ and $F_V$ with vector-meson dominance, we estimate sensitivities to $d_s$ at the level of $\mathcal{O}(10^{-16})\,e\cdot\mathrm{cm}$ in $e^+e^-$ data at CMD-3 and $\mathcal{O}(10^{-18})\,e\cdot\mathrm{cm}$ using existing $J/ψ$ samples at BESIII. Future experiments at the Super Tau-Charm Facility and Belle~II can further improve the reach by an order of magnitude. |
| title | Probing Quark Electric Dipole Moment with Topological Anomalies |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2602.14906 |