Affiliation:
1. University of California
2. Institute of Particle and Nuclear Studies (IPNS)
3. High Energy Accelerator Research Organization (KEK)
4. Seoul National University of Science and Technology
5. The Barcelona Institute of Science and Technology (BIST)
6. Case Western Reserve University
Abstract
We investigate a generic source of stochastic gravitational wave background due to the parametric resonance of oscillating scalar fields in the early Universe. By systematically analyzing benchmark models through lattice simulations and considering a wide range of parameters, we demonstrate that such a scenario can lead to detectable signals in gravitational wave detectors over a broad frequency range and potentially address the recent findings by pulsar timing array experiments. Furthermore, these models naturally yield ultralight dark matter candidates or dark radiation detectable by cosmic microwave background observatories.
Published by the American Physical Society
2024
Funder
U.S. Department of Energy
’la Caixa’ Foundation
Horizon 2020 Framework Programme
H2020 Marie Sk?odowska-Curie Actions
Lynne Cohen Foundation for Ovarian Cancer Research
Seoul National University of Science and Technology
Grant-in-Aid for Scientific Research
Yukawa Institute Computer Facility
Publisher
American Physical Society (APS)
Cited by
2 articles.
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