CP violation (changes) in nLab

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Idea

(…)

• theta angle

• axion

• baryogenesis

• flavor problem

References

• Roberto Peccei, The Strong CP Problem and Axions, Lect. Notes Phys.741:3-17,2008 (arXiv:hep-ph/0607268)

• Strong CP problem and axion Phenomenology, Proceedings of the DAE Symp. on Nucl. Phys. 58 (2013) (pdf)

See also

• Wikipedia, Strong CP problem

• Wikipedia, CP violation

Argument for absence of CP-violation for the strong nuclear force (QCD):

• Wen-Yuan Ai, Juan S. Cruz, Bjorn Garbrecht, Carlos Tamarit, Absence of CP violation in the strong interactions [[arXiv:2001.07152](https://arxiv.org/abs/2001.07152)]

  published as: Consequences of the order of the limit of infinite spacetime volume and the sum over topological sectors for C P violation in the strong interactions Phys. Lett. B 822 (2021) 136616 [[doi:10.1016/j.physletb.2021.136616](https://doi.org/10.1016/j.physletb.2021.136616)]

• Wen-Yuan Ai, Bjorn Garbrecht, Carlos Tamarit, CP conservation in the strong interactions, Universe 10 5 (2024) 189 [[arXiv:2404.16026](https://arxiv.org/abs/2404.16026), doi:10.3390/universe10050189]

On flavour physics, CP violation and flavour anomalies:

• Antonio Pich, Flavour Dynamics and Violations of the CP Symmetry, Lectures at the 2017 and 2019 CERN - Latin-American Schools of High-Energy Physics (arXiv:1805.08597)

Discussion in the context of string theory:

• Peter Svrcek, Edward Witten, Axions In String Theory, JHEP 0606:051,2006 (arXiv:hep-th/0605206)

Discussion specificlly in the context of M-theory on G2-manifolds G₂-manifolds/ G2-MSSM G₂-MSSM is in (Svrcek-Witten 06, section 6) and

• Bobby Acharya, Konstantin Bobkov, Piyush Kumar, An M Theory Solution to the Strong CP Problem and Constraints on the Axiverse, JHEP 1011:105,2010 (arXiv:1004.5138)