Penning-Trap Searches for Lorentz and CPT Violation

TL;DR

This paper reviews recent experimental efforts using Penning traps to test Lorentz and CPT symmetry, summarizing theoretical models and analyzing how observed frequency shifts constrain violations of these fundamental symmetries.

Contribution

It provides a comprehensive overview of how Penning trap experiments test Lorentz and CPT symmetry, including new theoretical derivations and analysis of experimental constraints.

Findings

Constraints on Lorentz-violating coefficients from charge-to-mass ratio comparisons

Limits on Lorentz and CPT violation from magnetic moment measurements

Theoretical derivation of frequency shifts due to Lorentz violation

Abstract

An overview of recent progress on testing Lorentz and CPT symmetry using Penning traps is presented. The theory of quantum electrodynamics with Lorentz-violating operators of mass dimensions up to six is summarized. Dominant shifts in the cyclotron and anomaly frequencies of the confined particles and antiparticles due to Lorentz and CPT violation are derived. Existing results of the comparisons of charge-to-mass ratios and magnetic moments involving protons, antiprotons, electrons, and positrons are used to constrain various coefficients for Lorentz violation.