Spontaneous CP violation in supersymmetric QCD
Abstract We investigate a composite model of spontaneous CP violation based on a new supersymmetric QCD as a solution to the strong CP problem. The scalar components of the meson chiral superfields obtain complex vacuum expectation values to break CP symmetry spontaneously. Then, wavefunction renorm...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-09-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP09(2024)105 |
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| _version_ | 1850169120330350592 |
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| author | Shota Nakagawa Yuichiro Nakai Yaoduo Wang |
| author_facet | Shota Nakagawa Yuichiro Nakai Yaoduo Wang |
| author_sort | Shota Nakagawa |
| collection | DOAJ |
| description | Abstract We investigate a composite model of spontaneous CP violation based on a new supersymmetric QCD as a solution to the strong CP problem. The scalar components of the meson chiral superfields obtain complex vacuum expectation values to break CP symmetry spontaneously. Then, wavefunction renormalization for the quark kinetic terms provides the Cabibbo-Kobayashi-Maskawa (CKM) phase, while the strong CP phase θ ¯ $$ \overline{\theta} $$ is protected by nonrenormalization of the superpotential and hermiticity of the wavefunction renormalization factor. In our model, the right-handed down-type quark multiplets are given by composite states, enhancing their couplings to CP breaking fields, which is essential to realize the observed CKM phase. The non-perturbative dynamics generates the scale of spontaneous CP violation hierarchically lower than the Planck scale. We discuss potential corrections to θ ¯ $$ \overline{\theta} $$ and find a viable parameter space of the model to solve the strong CP problem without fine-tuning. |
| format | Article |
| id | doaj-art-5ea3f66de32e408faf0fcf5fe80a0274 |
| institution | OA Journals |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-5ea3f66de32e408faf0fcf5fe80a02742025-08-20T02:20:48ZengSpringerOpenJournal of High Energy Physics1029-84792024-09-012024911910.1007/JHEP09(2024)105Spontaneous CP violation in supersymmetric QCDShota Nakagawa0Yuichiro Nakai1Yaoduo Wang2Tsung-Dao Lee Institute, Shanghai Jiao Tong UniversityTsung-Dao Lee Institute, Shanghai Jiao Tong UniversityTsung-Dao Lee Institute, Shanghai Jiao Tong UniversityAbstract We investigate a composite model of spontaneous CP violation based on a new supersymmetric QCD as a solution to the strong CP problem. The scalar components of the meson chiral superfields obtain complex vacuum expectation values to break CP symmetry spontaneously. Then, wavefunction renormalization for the quark kinetic terms provides the Cabibbo-Kobayashi-Maskawa (CKM) phase, while the strong CP phase θ ¯ $$ \overline{\theta} $$ is protected by nonrenormalization of the superpotential and hermiticity of the wavefunction renormalization factor. In our model, the right-handed down-type quark multiplets are given by composite states, enhancing their couplings to CP breaking fields, which is essential to realize the observed CKM phase. The non-perturbative dynamics generates the scale of spontaneous CP violation hierarchically lower than the Planck scale. We discuss potential corrections to θ ¯ $$ \overline{\theta} $$ and find a viable parameter space of the model to solve the strong CP problem without fine-tuning.https://doi.org/10.1007/JHEP09(2024)105CKM ParametersCP ViolationSupersymmetry |
| spellingShingle | Shota Nakagawa Yuichiro Nakai Yaoduo Wang Spontaneous CP violation in supersymmetric QCD Journal of High Energy Physics CKM Parameters CP Violation Supersymmetry |
| title | Spontaneous CP violation in supersymmetric QCD |
| title_full | Spontaneous CP violation in supersymmetric QCD |
| title_fullStr | Spontaneous CP violation in supersymmetric QCD |
| title_full_unstemmed | Spontaneous CP violation in supersymmetric QCD |
| title_short | Spontaneous CP violation in supersymmetric QCD |
| title_sort | spontaneous cp violation in supersymmetric qcd |
| topic | CKM Parameters CP Violation Supersymmetry |
| url | https://doi.org/10.1007/JHEP09(2024)105 |
| work_keys_str_mv | AT shotanakagawa spontaneouscpviolationinsupersymmetricqcd AT yuichironakai spontaneouscpviolationinsupersymmetricqcd AT yaoduowang spontaneouscpviolationinsupersymmetricqcd |