This title appears in the Scientific Report :
2022
Please use the identifier:
http://hdl.handle.net/2128/33287 in citations.
Please use the identifier: http://dx.doi.org/10.22323/1.412.0003 in citations.
Strong CP Problem
Strong CP Problem
Quantum chromodynamics, the theory of strong interaction, admits a term which explicitly violates parity P and time reflection invariance T and due to the CPT theorem, also CP. Naturalness would predict this term with strength one, whereas empirical evidence from the electric dipole moment of the ne...
Saved in:
Personal Name(s): | Wirzba, Andreas (Corresponding author) |
---|---|
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 Theorie der Starken Wechselwirkung; IAS-4 |
Published in: | Regio2021 (2022) S. 003-026 |
Published in: |
Proceedings of RDP online PhD school and workshop 'Aspects of Symmetry' — PoS(Regio2021) - Sissa Medialab Trieste, Italy, 2022. - ISBN - doi:10.22323/1.412.0003 |
Imprint: |
Sissa Medialab Trieste, Italy
2022
|
Physical Description: |
23 pages |
DOI: |
10.22323/1.412.0003 |
Conference: | RDP online PhD school and workshop 'Aspects of Symmetry', Online (Rep of Georgia), 2021-11-08 - 2021-11-12 |
Document Type: |
Contribution to a book Contribution to a conference proceedings |
Research Program: |
Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.22323/1.412.0003 in citations.
Quantum chromodynamics, the theory of strong interaction, admits a term which explicitly violates parity P and time reflection invariance T and due to the CPT theorem, also CP. Naturalness would predict this term with strength one, whereas empirical evidence from the electric dipole moment of the neutron yields an upper bound of almost vanishing strength of this term. This is the so-called strong CP problem. In this report, I follow the path from the initial U(1)A problem of strong interaction physics, via the U(1)A anomaly and instantons, the theta vacuum, the electric dipole moment of the neutron and the necessity of explicit symmetry breaking to the Peccei-Quinn model, extended to invisible axions and axion-like particles and finally back to electric dipole moments of subatomic particles. |