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Related Experiment Video

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Setting Limits on Supersymmetry Using Simplified Models

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

Cavity bounds on higher-order lorentz-violating coefficients.

Stephen R Parker¹, Matthew Mewes, Paul L Stanwix

¹School of Physics, The University of Western Australia, Crawley WA, Australia.

Physical Review Letters

|June 4, 2011

Summary

This study tested a modern Michelson-Morley experiment for violations of Lorentz symmetry. It established the first experimental limits on nonrenormalizable Lorentz-violating operators in the Standard Model Extension.

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Area of Science:

Fundamental Physics
Particle Physics
Experimental Physics

Background:

The Standard Model Extension (SME) offers a framework to test for potential violations of Lorentz symmetry.
Lorentz violation could manifest through nonbirefringent and nondispersive coefficients.
Previous experiments have constrained certain SME coefficients, but higher-order terms remain largely untested.

Purpose of the Study:

To determine the sensitivity of a modern resonant-cavity Michelson-Morley experiment to higher-order SME coefficients.
To establish the first experimental constraints on coefficients associated with nonrenormalizable Lorentz-violating operators.

Main Methods:

Utilized data from a year-long run of a contemporary Michelson-Morley resonant-cavity experiment.
Analyzed the data to probe for subtle variations indicative of Lorentz violation.
Applied theoretical models to interpret the experimental sensitivity to specific SME coefficients.

Main Results:

The experiment demonstrated sensitivity to higher-order nonbirefringent and nondispersive SME coefficients.
The first direct experimental bounds were placed on coefficients linked to nonrenormalizable Lorentz-violating operators.
These results significantly extend the scope of experimental tests for Lorentz symmetry violation.

Conclusions:

Modern resonant-cavity Michelson-Morley experiments are powerful tools for probing fundamental physics beyond the Standard Model.
The study successfully constrained previously unmeasured parameters within the Standard Model Extension.
This work opens new avenues for searching for subtle signs of Lorentz violation in high-precision experiments.