Physics and Astronomy Department, Carleton College, Northfield, MN 55901, USA.
Rep Prog Phys. 2014 Jun;77(6):062901. doi: 10.1088/0034-4885/77/6/062901. Epub 2014 May 29.
The realization that Planck-scale physics can be tested with existing technology through the search for spacetime-symmetry violation brought about the development of a comprehensive framework, known as the gravitational standard-model extension (SME), for studying deviations from exact Lorentz and CPT symmetry in nature. The development of this framework and its motivation led to an explosion of new tests of Lorentz symmetry over the past decade and to considerable theoretical interest in the subject. This work reviews the key concepts associated with Lorentz and CPT symmetry, the structure of the SME framework, and some recent experimental and theoretical results.
人们认识到，通过寻找时空对称性破坏，利用现有技术就可以检验普朗克尺度物理学，这促使人们制定了一个全面的框架，即引力标准模型扩展（SME），用于研究自然界中偏离精确洛伦兹和 CPT 对称性的现象。该框架的发展及其动机导致了过去十年中对洛伦兹对称性的大量新测试，并引起了人们对该主题的极大理论兴趣。这项工作回顾了与洛伦兹和 CPT 对称性相关的关键概念、SME 框架的结构以及一些最近的实验和理论结果。
