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Updated: Apr 25, 2026

Setting Limits on Supersymmetry Using Simplified Models
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V Alan Kostelecký1, Matthew Mewes2

  • 1Physics Department, Indiana University, Bloomington, Indiana 47405, USA.

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|August 29, 2014
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Summary

Tiny violations of Lorentz and CPT symmetry may appear in quantum gravity theories like string theory. New gamma-ray burst data significantly enhances tests for these fundamental symmetry violations in photons.

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Area of Science:

  • Theoretical Physics
  • Quantum Gravity
  • Particle Physics

Background:

  • Lorentz symmetry is a cornerstone of Einstein's theory of relativity.
  • Quantum gravity theories, such as string theory, may predict subtle violations of Lorentz and CPT symmetries.
  • Previous experimental constraints on these violations were limited.

Purpose of the Study:

  • To investigate potential violations of Lorentz and CPT symmetry.
  • To leverage new observational data to improve sensitivity to these fundamental symmetries.
  • To probe the predictions of quantum gravity theories.

Main Methods:

  • Analysis of linear polarization data from gamma-ray bursts.
  • Comparison of observational data with theoretical predictions for photon propagation.
  • Utilizing astrophysical phenomena as natural laboratories for fundamental physics.

Main Results:

  • Recent evidence from gamma-ray bursts provides improved sensitivities to Lorentz and CPT violation.
  • Sensitivities have been enhanced by factors ranging from ten to a million.
  • The findings place new constraints on potential deviations from fundamental symmetries.

Conclusions:

  • Astrophysical observations, particularly from gamma-ray bursts, are powerful tools for testing fundamental symmetries.
  • The study demonstrates the potential for discovering tiny violations of Lorentz and CPT symmetry.
  • These results contribute to the ongoing search for a consistent theory of quantum gravity.