The standard-model extension (SME) is an effective field theory framework aiming at parametrizing any violation to the Lorentz symmetry (LS) in all sectors of physics. In this Letter, we report the first direct experimental measurement of SME coefficients performed simultaneously within two sectors of the SME framework using lunar laser ranging observations. We consider the pure gravitational sector and the classical point-mass limit in the matter sector of the minimal SME. We report no deviation from general relativity and put new realistic stringent constraints on LS violations improving up to 3 orders of magnitude previous estimations.

中文翻译：

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月球激光测距的重力耦合对洛仑兹对称的违反

标准模型扩展（SME）是一个有效的场论框架，旨在对所有物理领域违反洛伦兹对称性（LS）的任何参数进行参数化。在这封信中，我们报告了使用月球激光测距观测在SME框架的两个部门中同时进行的SME系数的首次直接实验测量。我们考虑了最小SME的物质部门中的纯引力部门和经典点质量极限。我们报告没有偏离广义相对论，并且对LS违规提出了新的现实严格限制，从而将以前的估计提高了3个数量级。