Neil Russell

Tests of CPT and Lorentz Symmetry in Penning-Trap Experiments

We find that the use of a general theoretical framework incorporating CPT and Lorentz breaking permits a detailed investigation of possible experimental signatures in Penning-trap experiments. Our results indicate that the sharpest tests of CPT symmetry emerge from comparisons of anomaly frequencies in g — 2 experiments. Our estimates of appropriate figures of merit provide bounds of approximately 1020 in electron-positron experiments and of 1023 for a plausible proton-antiproton experiment, Other signals involving possible diurnal variations provide additional bounds at the level of 1018 in the electron-positron system and 1021 in the proton-antiproton system. A table showing all our estimated bounds is presented in Ref. [10].

Testing CPT and Lorentz Symmetry with Protons and Antiprotons in Penning Traps 1

A theoretical analysis is performed of Penning-trap experiments comparing protons and antiprotons to test CPT and Lorentz symmetry through measurements of anomalous magnetic moments and charge-to-mass ratios. Possible CPT and Lorentz violations arising at a fundamental level are treated in the context of a general extension of the standard model of particle physics and its restriction to quantum electrodynamics. In a suggested experiment measuring anomaly frequencies a bound on CPT violation of 10−23 for a relevant figure of merit is attainable. Experiments comparing cyclotron frequencies are sensitive within this theoretical framework to different kinds of Lorentz violation that preserve CPT. Constraints could be obtained on one figure of merit at 10−24 and on another in a related experiment with H− ions and antiprotons at the level of 10−25.

Testing CPT and Lorentz symmetry with protons and anti-protons in Penning traps

A theoretical analysis is performed of Penning-trap experiments comparing protons and antiprotons to test CPT and Lorentz symmetry through measurements of anomalous magnetic moments and charge-to-mass ratios. Possible CPT and Lorentz violations arising at a fundamental level are treated in the context of a general extension of the standard model of particle physics and its restriction to quantum electrodynamics. In a suggested experiment measuring anomaly frequencies a bound on CPT violation of 10−23 for a relevant figure of merit is attainable. Experiments comparing cyclotron frequencies are sensitive within this theoretical framework to different kinds of Lorentz violation that preserve CPT. Constraints could be obtained on one figure of merit at 10−24 and on another in a related experiment with H− ions and antiprotons at the level of 10−25.