Gravitational Waves from $\textit{Type-I}$ Strings in a Neutrino Mass Model

Adeela Afzal

doi:10.1016/j.dark.2025.102204

paper

Gravitational Waves from $Type-I$ Strings in a Neutrino Mass Model

arXiv:2509.11107 · doi:10.1016/j.dark.2025.102204

Abstract

In this work, we propose a novel realization of $type-I$ cosmic strings arising from the spontaneous breaking of an extended gauge symmetry $S U (2)_{R} \times U (1)_{B - L}$ 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 $type-I$ cosmic strings, where the gauge coupling dominates over the scalar self-coupling ( $β \equiv λ /2 g^{2} < 1$ ). 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.

8 pages, 4 figures, 1 table: Matches the published version

Gravitational Waves from Type-I Strings in a Neutrino Mass Model

Abstract

References in corpus (22)

Gravitational Waves from $Type-I$ Strings in a Neutrino Mass Model