Prediction of the CP Phase $δ_{CP}$ in the Neutrino Oscillation and an Axion-less Solution to the Strong CP Problem
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866910702187315200 |
|---|---|
| author | Tanimoto, Morimitsu Yanagida, Tsutomu T. |
| author_facet | Tanimoto, Morimitsu Yanagida, Tsutomu T. |
| contents | A model of the axion-less solution to the strong CP problem has been recently constructed based on the $\bf T^2/\mathbb{Z}_3$ orbifold in the six dimensional space-time. We extend, in this paper, the model to include the lepton sector with three right-handed neutrinos. A crucial point in the extended model is that we have only one CP-violating phase and thus the CP phase in the neutrino oscillation can be predicted by the CP phase in the CKM matrix. The CP phase $δ_{CP}$ in the PMNS matrix is predicted as $δ_{CP}\simeq 192^\circ - 195^\circ$ which can be tested in the near future experiments. We also discuss the effective mass $m_{ββ}$ responsible for the neutrino-less double beta decay of nucleus, which is predicted as $m_{ββ} \simeq 8-11$\,meV. We consider the leptogenesis and confirm that our model generates the right sign of the baryon asymmetry if the first family right-handed neutrino is the lightest among the heavy right-handed neutrinos. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_01224 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Prediction of the CP Phase $δ_{CP}$ in the Neutrino Oscillation and an Axion-less Solution to the Strong CP Problem Tanimoto, Morimitsu Yanagida, Tsutomu T. High Energy Physics - Phenomenology A model of the axion-less solution to the strong CP problem has been recently constructed based on the $\bf T^2/\mathbb{Z}_3$ orbifold in the six dimensional space-time. We extend, in this paper, the model to include the lepton sector with three right-handed neutrinos. A crucial point in the extended model is that we have only one CP-violating phase and thus the CP phase in the neutrino oscillation can be predicted by the CP phase in the CKM matrix. The CP phase $δ_{CP}$ in the PMNS matrix is predicted as $δ_{CP}\simeq 192^\circ - 195^\circ$ which can be tested in the near future experiments. We also discuss the effective mass $m_{ββ}$ responsible for the neutrino-less double beta decay of nucleus, which is predicted as $m_{ββ} \simeq 8-11$\,meV. We consider the leptogenesis and confirm that our model generates the right sign of the baryon asymmetry if the first family right-handed neutrino is the lightest among the heavy right-handed neutrinos. |
| title | Prediction of the CP Phase $δ_{CP}$ in the Neutrino Oscillation and an Axion-less Solution to the Strong CP Problem |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.01224 |