Gravitational Waves from $\textit{Type-I}$ Strings in a Neutrino Mass Model
Fuente:
arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911357282025472 |
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| author | Afzal, Adeela |
| author_facet | Afzal, Adeela |
| contents | In this work, we propose a novel realization of $\textit{type-I}$ cosmic strings arising from the spontaneous breaking of an extended gauge symmetry $SU(2)_R\times U(1)_{B-L}$ in the context of a low-scale split seesaw mechanism for neutrino mass generation. We demonstrate that the split seesaw framework, which explains the smallness of neutrino masses, naturally motivates a small scalar self-coupling $λ$. This intrinsically links the neutrino mass generation mechanism to the formation of $\textit{type-I}$ cosmic strings, where the gauge coupling dominates over the scalar self-coupling ($β\equivλ/2g^2<1$). We explore the cosmological implications of these strings, including their gravitational wave signatures that are testable in current and future experiments. Our findings establish a compelling and testable connection between neutrino mass generation and cosmic string phenomenology in an underexplored region of parameter space. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_11107 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gravitational Waves from $\textit{Type-I}$ Strings in a Neutrino Mass Model Afzal, Adeela High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory In this work, we propose a novel realization of $\textit{type-I}$ cosmic strings arising from the spontaneous breaking of an extended gauge symmetry $SU(2)_R\times U(1)_{B-L}$ in the context of a low-scale split seesaw mechanism for neutrino mass generation. We demonstrate that the split seesaw framework, which explains the smallness of neutrino masses, naturally motivates a small scalar self-coupling $λ$. This intrinsically links the neutrino mass generation mechanism to the formation of $\textit{type-I}$ cosmic strings, where the gauge coupling dominates over the scalar self-coupling ($β\equivλ/2g^2<1$). We explore the cosmological implications of these strings, including their gravitational wave signatures that are testable in current and future experiments. Our findings establish a compelling and testable connection between neutrino mass generation and cosmic string phenomenology in an underexplored region of parameter space. |
| title | Gravitational Waves from $\textit{Type-I}$ Strings in a Neutrino Mass Model |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory |
| url | https://arxiv.org/abs/2509.11107 |