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Light-bending tests of Lorentz invariance

Classical light bending is investigated for weak gravitational fields in the presence of hypothetical local Lorentz violation. Using an effective field theory framework that describes general deviations from local Lorentz invariance, we derive a modified deflection angle for light passing near a massive body. The results include anisotropic effects not present for spherical sources in General Relativity as well as Weak Equivalence Principle violation. We develop an expression for the relative deflection of two distant stars that can be used to analyze data in past and future solar-system observations. The measurement sensitivities of such tests to coefficients for Lorentz violation are discussed.

preprint2011arXivOpen access
Rhondale TsoQuentin G. Bailey
gr-qc
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Open access2 authors1 topic
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Rhondale TsoQuentin G. Bailey

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