Parametric resonance of gravitational waves in general scalar-tensor theories

verfasst von

Yi Fu Cai, Guillem Domènech, Alexander Ganz, Jie Jiang, Chunshan Lin, Bo Wang

Abstract

Gravitational waves offer a potent mean to test the underlying theory of gravity. In general theories of gravity, such as scalar-tensor theories, one expects modifications in the friction term and the sound speed in the gravitational wave equation. In that case, rapid oscillations in such coefficients, e.g. due to an oscillating scalar field, may lead to narrow parametric resonances in the gravitational wave strain. We perform a general analysis of such possibility within DHOST theories. We use disformal transformations to find the theory space with larger resonances, within an effective field theory approach. We then apply our formalism to a non-minimally coupled ultra-light dark matter scalar field, assuming the presence of a primordial gravitational wave background, e.g., from inflation. We find that the resonant peaks in the spectral density may be detectable by forthcoming detectors such as LISA, Taiji, Einstein Telescope and Cosmic Explorer.

Organisationseinheit(en)

Institut für Theoretische Physik
Fakultät für Mathematik und Physik

Externe Organisation(en)

University of Science and Technology of China
Jagiellonian University
Pusan National University

Typ

Artikel

Journal

Journal of Cosmology and Astroparticle Physics

Band

2024

ISSN

1475-7516

Publikationsdatum

10.2024

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Astronomie und Astrophysik

Elektronische Version(en)

https://doi.org/10.48550/arXiv.2311.18546 (Zugang: Offen)
https://doi.org/10.1088/1475-7516/2024/10/027 (Zugang: Offen)