Minimal seesaw and leptogenesis with the smallest modular finite group
Fuente:
arXiv
Salvato in:
| Autori principali: | , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866914788170268672 |
|---|---|
| author | Marciano, Simone Meloni, Davide Parriciatu, Matteo |
| author_facet | Marciano, Simone Meloni, Davide Parriciatu, Matteo |
| contents | We propose a model for leptons based on the smallest modular finite group $Γ_2\cong S_3$ that, for the first time, accounts for both the hints of large low-energy CP-violation in the lepton sector and the matter-antimatter asymmetry of the Universe, generated by only two heavy right-handed neutrinos. These same states are also employed in a Minimal seesaw mechanism to generate light neutrino masses. Besides the heavy neutrinos, our particle content is the same as the Standard Model (SM), with the addition of one single modulus $τ$, whose vacuum expectation value is responsible for both the modular and CP-symmetry breakings. We show that this minimalistic SM extension is enough to get an excellent fit to low energy neutrino observables and to the required baryon asymmetry $η_B$. Predictions for the neutrino mass ordering, effective masses in neutrinoless double beta decay and tritium decay as well as for the Majorana phases are also provided. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_18547 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Minimal seesaw and leptogenesis with the smallest modular finite group Marciano, Simone Meloni, Davide Parriciatu, Matteo High Energy Physics - Phenomenology We propose a model for leptons based on the smallest modular finite group $Γ_2\cong S_3$ that, for the first time, accounts for both the hints of large low-energy CP-violation in the lepton sector and the matter-antimatter asymmetry of the Universe, generated by only two heavy right-handed neutrinos. These same states are also employed in a Minimal seesaw mechanism to generate light neutrino masses. Besides the heavy neutrinos, our particle content is the same as the Standard Model (SM), with the addition of one single modulus $τ$, whose vacuum expectation value is responsible for both the modular and CP-symmetry breakings. We show that this minimalistic SM extension is enough to get an excellent fit to low energy neutrino observables and to the required baryon asymmetry $η_B$. Predictions for the neutrino mass ordering, effective masses in neutrinoless double beta decay and tritium decay as well as for the Majorana phases are also provided. |
| title | Minimal seesaw and leptogenesis with the smallest modular finite group |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2402.18547 |