2025/09/20 by Xia, Zhong-Wu, Gong, Huajie, Pan, Qiyuan +1 · 3 citations
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th)
paper · doi:10.48550/arxiv.2509.16838
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 l appears in the leading order for the corrections of energy and angular momentum fluxes, and as |l| 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 |l|∼ 10-6 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 Δl ∼ 10-5 at SNR = 20, demonstrating the potential of space-based gravitational wave detectors to rigorously test the KR field.