Details
| Original language | English |
|---|---|
| Article number | 027 |
| Journal | Journal of Cosmology and Astroparticle Physics |
| Volume | 2024 |
| Issue number | 10 |
| Early online date | 8 Oct 2024 |
| Publication status | Published - Oct 2024 |
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.
Keywords
- Gravitational waves in GR and beyond: theory, modified gravity, primordial gravitational waves (theory)
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Astronomy and Astrophysics
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In: Journal of Cosmology and Astroparticle Physics, Vol. 2024, No. 10, 027, 10.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Parametric resonance of gravitational waves in general scalar-tensor theories
AU - Cai, Yi Fu
AU - Domènech, Guillem
AU - Ganz, Alexander
AU - Jiang, Jie
AU - Lin, Chunshan
AU - Wang, Bo
N1 - Publisher Copyright: © 2024 The Author(s)
PY - 2024/10
Y1 - 2024/10
N2 - 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.
AB - 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.
KW - Gravitational waves in GR and beyond: theory
KW - modified gravity
KW - primordial gravitational waves (theory)
UR - http://www.scopus.com/inward/record.url?scp=85207122023&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2311.18546
DO - 10.48550/arXiv.2311.18546
M3 - Article
AN - SCOPUS:85207122023
VL - 2024
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
SN - 1475-7516
IS - 10
M1 - 027
ER -