TY  - JOUR
AU  - Amarilo, K. M.
AU  - Ferreira Filho, M. B.
AU  - Araujo Filho, A. A.
AU  - Reis, J. A. A. S.
PY  - 2024
DA  - 2024//
TI  - Gravitational waves effects in a Lorentz-violating scenario
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 138785
EP  - 7pp
VL  - 855
PB  - Elsevier
KW  - Gravitational waves
KW  - Lorentz symmetry breaking
KW  - Polarization states
KW  - Quadrupole term
AB  - This paper focuses on how the production and polarization of gravitational waves are affected by spontaneous Lorentz symmetry breaking, which is driven by a self-interacting vector field. Specifically, we examine the impact of a smooth quadratic potential and a non-minimal coupling, discussing the constraints and causality features of the linearized Einstein equation. To analyze the polarization states of a plane wave, we consider a fixed vacuum expectation value (VEV) of the vector field. Remarkably, we verify that a space-like background vector field modifies the polarization plane and introduces a longitudinal degree of freedom. In order to investigate the Lorentz violation effect on the quadrupole formula, we use the modified Green function. Finally, we show that the space-like component of the background field leads to a third-order time derivative of the quadrupole moment, and the bounds for the Lorentz-breaking coefficients are estimated as well.
SN  - 0370-2693
UR  - https://arxiv.org/abs/2307.10937
UR  - https://doi.org/10.1016/j.physletb.2024.138785
DO  - 10.1016/j.physletb.2024.138785
LA  - English
N1  - WOS:001257664300001
ID  - Amarilo_etal2024
ER  -