Work

Gravitational Waves and Nambu-Goldstone Bosons from Infrared-Finite Cosmic Strings

Year: 2026

Type: preprint

Abstract: Skyrmion lines and semi-local strings are examples of infrared-finite cosmic strings that arise in theories with spontaneously broken global symmetries. Unlike global $U(1)$ strings, they do not support the long-range Nambu-Goldstone boson (NGB) profile responsible for a logarithmically infrared-divergent string tension. We argue that NGB emission from their low-frequency oscillations is strongly suppressed. Consequently, their gravitational-wave signals may be comparable to those from local strings.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.08254

Authors: Fukuda, Hajime, Ge, Shuailiang, Harigaya, Keisuke

Institution: The University of Tokyo

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7220969236

Cites: 36

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Related to: 10