https://doi.org/10.1140/epjc/s10052-025-14701-0
Regular Article - Theoretical Physics
Probing Kalb–Ramond field with extreme mass ratio inspirals
1
Department of Physics, Institute of Interdisciplinary Studies, Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Synergetic Innovation Center for Quantum Effects and Applications, and Hunan Research Center of the Basic Discipline for Quantum Effects and Quantum Technologies, Hunan Normal University, 410081, Changsha, Hunan, People’s Republic of China
2
Center for Gravitation and Cosmology, College of Physical Science and Technology, Yangzhou University, 225009, Yangzhou, People’s Republic of China
a
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Received:
24
June
2025
Accepted:
29
August
2025
Published online:
9
September
2025
The extreme-mass-ratio inspirals (EMRIs) are emerging as precision laboratories for testing the gravity beyond general relativity. In this work, we investigate the Lorentz symmetry breaking (LSB) effect induced by the Kalb–Ramond (KR) field on the gravitational waveforms from the EMRI system. We observe that the LSB parameter 
appears in the leading order for the corrections of energy and angular momentum fluxes, and as 
increases, the differences in EMRI waveforms between the KR black hole and Schwarzschild black hole become more pronounced. We note that the LSB effect becomes detectable by LISA for values of 
with a one-year observation period. Furthermore, we use the Fisher information matrix (FIM) approach for the parameter estimation and find the detection error for l can be constrained to 
at 
, demonstrating the potential of space-based gravitational wave detectors to rigorously test the KR field.
© The Author(s) 2025
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Funded by SCOAP3.
