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Constraining velocity-dependent Lorentz/CPT-violations using Lunar Laser Ranging

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arxiv 2011.06641 v1 pith:F4R64XTI submitted 2020-11-12 gr-qc

A. Bourgoin (1 , 2) , S. Bouquillon (2) , A. Hees (2) , C. Le Poncin-Lafitte (2) , Q. G. Bailey (3) , J. J. Howard (3) , M.-C. Angonin (2)
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G. Francou (2) J. Chabé (4) C. Courde (4) J.-M. Torre (4) ((1) Dipartimento di Ingegneria Industriale University of Bologna Forlì Italy (2) SYRTE Observatoire de Paris Université PSL CNRS Sorbonne Université LNE Paris France (3) Department of Physics Astronomy Embry-Riddle Aeronautical University Prescott Arizona USA (4) Observatoire de la Côte d'Azur Géoazur Université de Nice Sophia-Antipolis Caussols France)
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keywords lorentzcpt-violationslunarranginganalysiscoefficientsconstraintscpt-breaking
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The possibility for Lorentz/CPT-breaking, which is motivated by unification theories, can be systematically tested within the standard-model extension framework. In the pure gravity sector, the mass dimension 5 operators produce new Lorentz and CPT-breaking terms in the 2-body equations of motion that depend on the relative velocity of the bodies. In this Letter, we report new constraints on 15 independent SME coefficients for Lorentz/CPT-violations with mass dimension 5 using lunar laser ranging. We perform a global analysis of lunar ranging data within the SME framework using more than 26,000 normal points between 1969 and 2018. We also perform a jackknife analysis in order to provide realistic estimates of the systematic uncertainties. No deviation from Lorentz/CPT symmetries is reported. In addition, when fitting simultaneously for the 15 canonical SME coefficients for Lorentz/CPT-violations, we improve up to three orders of magnitude previous post-fit constraints from radio pulsars.

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  1. Gravitational-wave generation in the presence of Lorentz invariance violation

    gr-qc 2025-06 conditional novelty 7.0 of 10

    Gravitational waves in a class of Lorentz-violating gravity theories would have amplitude components that do not decay with distance, strongly constraining those theories.

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