Stochastic gravitational wave background from chiral superconducting cosmic strings

Rybak, I. Yu. (Universidad de Zaragoza) ; Sousa, L.

Resumen: We investigate the emission of vector radiation by superconducting cosmic string loops, deriving general relations to characterize the vector radiation emission efficiency, and study its impact on the evolution of loops. Building on these results, we compute the stochastic gravitational wave background generated by a chiral superconducting cosmic string network, including the impact of vector radiation for the very first time. Our analysis reveals that strong coupling between superconducting cosmic strings and the vector field may lead to a substantial suppression of the gravitational wave signal, while moderate coupling may still produce a detectable signal. We demonstrate that, in this intermediate limit, the presence of superconductivity in cosmic strings may help reconcile their gravitational wave spectrum with pulsar timing array data for large enough values of current.

Idioma: Inglés

DOI: 10.1103/PhysRevD.111.083502

Año: 2025

Publicado en: Physical Review D 111, 8 (2025), 0835021-08350222
ISSN: 2470-0010

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E21-17R

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)