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Pulsar tests of the gravitational Lorentz violation

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arxiv 1905.08405 v1 pith:PVPZ5KF2 submitted 2019-05-21 gr-qc astro-ph.HEhep-ph

Lijing Shao This is my paper · ORCID
classification gr-qcastro-ph.HEhep-ph
keywords dimensiongravitationalmassdeviationpulsarsbinarycatalogedcelestial
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Pulsars are precision celestial clocks. When being put in a binary, the ticking conveys the secret of underlying spacetime geometrodynamics. We use pulsars to test if the gravitational interaction possesses a tiny deviation from Einstein's General Relativity (GR). In the framework of Standard-Model Extension (SME), we systematically search for Lorentz-violating operators cataloged by (a) the minimal couplings of mass dimension 4, (b) the CPT symmetry of mass dimension 5, and (c) the gravitational weak equivalence principle (GWEP) of mass dimension 8. No deviation from GR was found yet.

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

    hep-ph 2019-08 accept novelty 6.0 of 10

    Using three small-eccentricity relativistic binary pulsars, this paper obtains order-of-magnitude upper limits on SME matter-gravity coefficients for neutrons, protons, and electrons.

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