https://doi.org/10.1140/epjc/s10052-024-13521-y
Regular Article
Gravitational waves from axion wave production
1
School of Physics, Beijing Institute of Technology, 100081, Beijing, People’s Republic of China
2
School of Physics Sciences, University of Chinese Academy of Sciences, 100039, Beijing, People’s Republic of China
3
Center for Future High Energy Physics, Institute of High Energy Physics, Chinese Academy of Sciences, 100039, Beijing, People’s Republic of China
4
Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
a
limingqiu17@mails.ucas.ac.cn
b
sichunssun@gmail.com
c
yanqishu@ucas.ac.cn
d
zhijie.zhao@desy.de
Received:
20
July
2024
Accepted:
20
October
2024
Published online:
18
November
2024
We consider a scenario with axions/axion-like particles Chern–Simons gravity coupling, such that gravitational waves can be produced directly from axion wave parametric resonance in the early universe after inflation. This axion gravity term is less constrained compared to the well-searched axion photon coupling and can provide a direct and efficient production channel for gravitational waves. Such stochastic gravitational waves can be detected by either space/ground-based gravitational wave detectors or pulsar timing arrays for a broad range of axion masses and decay constants.
© The Author(s) 2024
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