Lorentz-violating matter-gravity couplings in small-eccentricity binary pulsars

Abstract

Lorentz symmetry is an important concept in modern physics. Precision pulsar timing was used to put tight constraints on the coefficients for Lorentz violation in the pure-gravity sector of the Standard-Model Extension (SME). We extend the analysis to Lorentz-violating matter-gravity couplings, utilizing three small-eccentricity relativistic neutron star (NS) -- white dwarf (WD) binaries. We obtain compelling limits on various SME coefficients related to the neutron, the proton, and the electron. These results are complementary to limits obtained from lunar laser ranging and clock experiments.

7 pages, 1 figure, 4 tables; Invited research article to special issue "Symmetry in Special and General Relativity"

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Cited by in corpus (10)

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• Combined search for anisotropic birefringence in the gravitational-wave transient catalog GWTC-1
• New test of Lorentz invariance using the MICROSCOPE space mission
• Gravitational wave constraints on non-birefringent dispersions of gravitational waves due to Lorentz violations with GWTC-3
• New limits on the local Lorentz invariance violation of gravity in the Standard-Model Extension with pulsars
• Modified gravitational wave propagations in linearized gravity with Lorentz and diffeomorphism violations and their gravitational wave constraints
• Gravitational waves in a minimal gravitational SME
• Propagation effects of Lorentz violation in gravitational waves
• Nonminimal Lorentz Violation in Macroscopic Matter