Axion in the minimal SO(10) GUT
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arXiv
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866908614164217856 |
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| author | Fukuyama, Takeshi |
| author_facet | Fukuyama, Takeshi |
| contents | The QCD axion is investigated within the minimal supersymmetric SO(10) grand unified theory, where the Yukawa sector involves Higgs multiplets ${\bf 10}$ and $\overline{\bf 126}$. The relative phase between the VEVs of $({\bf 10,1,3})\subset\overline{\bf 126}$ and $({\bf \overline{10},1,3})\subset{\bf 126}$ under ${\rm SU}(4)_C\times{\rm SU}(2)_L\times{\rm SU}(2)_R$ is identified with the axion. The Peccei-Quinn and $B-L$ symmetry breaking scales coincide through $|\langleΔ_R\rangle|=|\langle\overlineΔ_R\rangle|$. The scalar partner of the lightest right-handed neutrino plays the role of the inflaton, realizing hybrid inflation consistent with the observed CMB density fluctuations. After inflation, both fields acquire VEVs, and the domain-wall problem is resolved through the Lazarides-Shafi mechanism, which naturally restricts the model to three generations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_22962 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Axion in the minimal SO(10) GUT Fukuyama, Takeshi High Energy Physics - Phenomenology The QCD axion is investigated within the minimal supersymmetric SO(10) grand unified theory, where the Yukawa sector involves Higgs multiplets ${\bf 10}$ and $\overline{\bf 126}$. The relative phase between the VEVs of $({\bf 10,1,3})\subset\overline{\bf 126}$ and $({\bf \overline{10},1,3})\subset{\bf 126}$ under ${\rm SU}(4)_C\times{\rm SU}(2)_L\times{\rm SU}(2)_R$ is identified with the axion. The Peccei-Quinn and $B-L$ symmetry breaking scales coincide through $|\langleΔ_R\rangle|=|\langle\overlineΔ_R\rangle|$. The scalar partner of the lightest right-handed neutrino plays the role of the inflaton, realizing hybrid inflation consistent with the observed CMB density fluctuations. After inflation, both fields acquire VEVs, and the domain-wall problem is resolved through the Lazarides-Shafi mechanism, which naturally restricts the model to three generations. |
| title | Axion in the minimal SO(10) GUT |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.22962 |