https://doi.org/10.1140/epjc/s10052-024-12735-4
Regular Article - Theoretical Physics
Constraints on Einstein-dilaton Gauss-Bonnet gravity with Taiji
1
School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 310024, Hangzhou, China
2
Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, China
3
University of Chinese Academy of Sciences (UCAS), 100049, Beijing, China
4
Center for Gravitation and Cosmology, College of Physical Science and Technology, Yangzhou University, 225009, Yangzhou, China
5
School of Physical Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, 100049, Beijing, China
6
CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, China
Received:
19
January
2024
Accepted:
30
March
2024
Published online:
14
April
2024
In the 2030s, space-based gravitational-wave (GW) detectors will exhibit unprecedented sensitivity in the millihertz frequency band, greatly expanding the potential for testing theories of gravity compared to ground-based GW detectors. Inspired by effective string theory, Einstein-dilaton Gauss–Bonnet (EdGB) gravity introduces an extra dilaton scalar field that is directly coupled to higher curvature terms. Here, we investigate the capability of Taiji to constrain the parameters of EdGB gravity by analyzing GWs from massive black hole binaries (MBHBs). We utilize the parameterized post-Einsteinian (ppE) waveform with the leading order EdGB corrections for the inspiral phase of MBHBs. The constraints on the coupling constants are obtained by performing Fisher matrix analysis. With different mass ratios and spins 
at redshifts 
, the 
bounds on the parameter 
have the same order of magnitude: 
m.
© The Author(s) 2024
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Funded by SCOAP3.
