CPT and lorentz tests in Penning traps
CPT and lorentz tests in Penning traps
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DOI：
10.1103/physrevd.57.3932
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发表时间：
1998-04-01
影响因子：
5
通讯作者：
Russell, N
中科院分区：
文献类型：
--
作者：
Bluhm, R;Kostelecky, VA;Russell, N
通过测量反常磁矩和电荷质量比，对Penning-Trap实验进行了理论分析，验证了CPT和Lorentz对称性。在SU(3)xSU(2)Xu(1)标准模型的一般推广及其对量子电动力学的限制下，讨论了基态自发对称性破缺可能引起的CPT和Lorentz破坏.我们描述了在原理上可能出现的信号，引入了合适的品质因子，并估计了在目前和未来的彭宁陷阱实验中可以达到的CPT和Lorentz界。测量异常频率的实验被发现提供了对CPT对称性的最尖锐的测试。在电子-正电子的情况下，可以达到大约10(-20)的范围，对于建议的质子和反质子的实验，可以达到10(-23)的范围。在这些实验中搜索每天的频率变化也可以将某些类型的洛伦兹破坏限制在电子-正电子系统中的10(-18)水平，以及其他类型的在质子-反质子系统中的10(-21)水平。相比之下，在目前的理论框架内，比较回旋频率的测量对保持CPT的不同类型的洛伦兹破坏是敏感的。通过H离子与反质子的比较，可以得到电子-正电子系统中的一个优值系数为10(-16)，质子-反质子系统中的另一个为10(-24)，第三个为10(-25)。[S0556-2821(98)04207-6]。
A theoretical analysis is performed of Penning-trap experiments testing CPT and Lorentz symmetry through measurements of anomalous magnetic moments and charge-to-mass ratios. Possible CPT and Lorentz violations arising from spontaneous symmetry breaking at a fundamental level are treated in the context of a general extension of the SU(3)xSU(2)xU(1) standard model and its restriction to quantum electrodynamics. We describe signals that might appear in principle, introduce suitable figures of merit, and estimate CPT and Lorentz bounds attainable in present and future Penning-trap experiments. Experiments measuring anomaly frequencies are found to provide the sharpest tests of CPT symmetry. Bounds are attainable of approximately 10(-20) in the electron-positron case and of 10(-23) for a suggested experiment with protons and antiprotons. Searches for diurnal frequency variations in these experiments could also limit certain types of Lorentz violation to the level of 10(-18) in the electron-positron system and others at the level of 10(-21) in the proton-antiproton system. In contrast, measurements comparing cyclotron frequencies are sensitive within the present theoretical framework to different kinds of Lorentz violation that preserve CPT. Constraints could be obtained on one figure of merit in the electron-positron system at the level of 10(-16), on another in the proton-antiproton system at 10(-24), and a third at 10(-25) using comparisons of H- ions with antiprotons. [S0556-2821(98)04207-6].