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CP-Violating Axions: A Theory Review

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arxiv 2312.17310 v1 pith:MFLULNAQ submitted 2023-12-28 hep-ph

Luca Di Luzio , Hector Gisbert , Gabriele Levati , Paride Paradisi , Philip S{o}rensen This is my paper
classification hep-ph
keywords cp-violatingaxionaxion-nucleonaxionsfocuspartrecentreview
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We review the physics case for CP-violating axions. In the first part, we focus on the Quantum Chromodynamics (QCD) axion and argue that new sources of CP violation beyond QCD misalign the axion solution to the strong CP problem and can manifest themselves via a tiny scalar axion-nucleon component. We hence highlight recent advancements in calculating this scalar axion-nucleon coupling, a parameter that could be probed via axion-mediated force experiments. In the second part, we focus on axion-like particle (ALP) interactions entailing the most general sources of CP violation. After classifying the full set of CP-violating Jarlskog invariants, we report on recent calculations of ALP contributions to permanent electric dipole moments. We finally speculate on possible ultraviolet completions of the CP-violating ALP.

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Cited by 4 Pith papers

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  1. Light new physics and the $\tau$ lepton dipole moments: prospects at Belle II

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    hep-ph 2026-07 conditional novelty 6.0 of 10

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    This work provides a comprehensive analysis of light new physics contributions to tau lepton dipole moments, detailing interpretations of asymmetry measurements for spin-0 and spin-1 bosons, their decoupling to the EF...

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