Testing velocity-dependent CPT -violating gravitational forces with radio pulsars
Testing velocity-dependent CPT -violating gravitational forces with radio pulsars
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DOI：
10.1103/physrevd.98.084049
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发表时间：
2018-10
影响因子：
5
通讯作者：
Lijing Shao;Q. Bailey
中科院分区：
文献类型：
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作者：
Lijing Shao;Q. Bailey
在有效场论的精神，标准模型扩展（SME）提供了一个全面的框架，系统地探讨洛伦兹/CPT违反的可能性。在纯重力领域，质量维度大于4的算子虽然一般有利于短程实验，但很难用天文尺寸的系统进行研究。但是，如果首阶效应是CPT破坏的和速度相关的，则有例外。在这里，我们研究的最低阶运营商在纯重力部门违反CPT对称性精心挑选的相对论性脉冲双星系统。将已有的分析结果应用于双星轨道的动力学，我们对质量维为5的Lorentz/CPT破坏的各种系数进行了约束。这些约束条件是首次从后牛顿动力学中导出的，与从引力波传播的运动学中得到的约束条件是互补的。
In the spirit of effective field theory, the Standard-Model Extension (SME) provides a comprehensive framework to systematically probe the possibility of Lorentz/CPT violation. In the pure gravity sector, operators with mass dimension larger than 4, while in general being advantageous to short-range experiments, are hard to investigate with systems of astronomical size. However, there is exception if the leading-order effects are CPT-violating and velocity-dependent. Here we study the lowest-order operators in the pure gravity sector that violate the CPT symmetry with carefully chosen relativistic binary pulsar systems. Applying the existing analytical results to the dynamics of a binary orbit, we put constraints on various coefficients for Lorentz/CPT violation with mass dimension 5. These constraints, being derived from the post-Newtonian dynamics for the first time, are complementary to those obtained from the kinematics in the propagation of gravitational waves.