Low Energy Tests of Lorentz and CPT Violation

TL;DR

This paper reviews the theoretical framework and current experimental bounds on Lorentz and CPT violation using low-energy tests, highlighting recent high-precision measurements across various physical systems.

Contribution

It provides a comprehensive overview of the Standard Model Extension framework and summarizes the latest experimental bounds from diverse low-energy tests.

Findings

Current bounds on Lorentz and CPT violating parameters are stringent.

High-precision experiments constrain effects in electrons, protons, neutrons, and photons.

State-of-the-art measurements set new limits on fundamental symmetry violations.

Abstract

An overview of the theoretical framework of the Standard Model Extension (SME) that allows for a parametrization of Lorentz and CPT violating effects using effective field theory will be presented. A review of current bounds on these Lorentz violating parameters using various low-energy tests will be reviewed. State-of-the-art measurements involving the Penning Trap, atomic clock, torsion pendulum, and resonant cavities will be discussed. Different experiments can provide stringent bounds on a variety of parameters coupled to various fundamental particles including electrons, protons, neutrons, and photons.