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What do we know about Lorentz invariance?

Jay D Tasson1

  • 1Physics and Astronomy Department, Carleton College, Northfield, MN 55901, USA.

Reports on Progress in Physics. Physical Society (Great Britain)
|May 31, 2014
PubMed
Summary

Scientists can now test Planck-scale physics by searching for spacetime symmetry violations. This led to the gravitational Standard-Model Extension (SME) framework, enabling new tests of Lorentz and CPT symmetry.

Area of Science:

  • * Theoretical physics
  • * Quantum gravity
  • * Particle physics

Background:

  • * Planck-scale physics offers a window into quantum gravity.
  • * Testing Planck-scale physics is achievable with current technology by searching for spacetime symmetry violations.
  • * The Standard-Model Extension (SME) framework was developed to study deviations from Lorentz and CPT symmetry.

Purpose of the Study:

  • * To review the fundamental concepts of Lorentz and CPT symmetry.
  • * To outline the structure and components of the gravitational SME framework.
  • * To present recent experimental and theoretical findings in the field.

Main Methods:

  • * Review of theoretical frameworks for spacetime symmetry.
  • * Analysis of the gravitational Standard-Model Extension (SME) structure.

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  • * Compilation of recent experimental tests and theoretical developments.

    • Main Results:

    • * The development of the gravitational SME framework has spurred numerous tests of Lorentz symmetry.
    • * Significant theoretical interest has been generated in the study of Lorentz and CPT symmetry.
    • * Existing technology enables the search for Planck-scale physics through symmetry violation.

    Conclusions:

    • * The gravitational SME provides a robust framework for probing fundamental symmetries.
    • * Experimental and theoretical research in this area is rapidly advancing.
    • * The search for spacetime symmetry violation is a key avenue for testing Planck-scale physics.