Undergraduate Thesis Or Project
 

Testing, Development, and First Results of a Method for Measurement of the Isotropy of the One-Way Speed of Light.

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https://ir.library.oregonstate.edu/concern/undergraduate_thesis_or_projects/6w924h638

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  • The standard model (SM) of particle physics describes many of the experimentally observed subatomic particle interactions. However, there are a few discrepancies with the SM namely: matter/antimatter asymmetry and dark energy. A current extension of the SM allows for small amounts of Lorentz Violation to fix these discrepancies. Lorentz Violating terms in the standard model extension allow for a small spatial dependence of the speed of light measurable to terrestrial laboratories as a time variation in the speed of light. We present the testing and development of a novel method for measuring the anisotropy of light[1], using the CEBAF accelerator at JLab. Variations in the electron beam’s momentum are measured at the entrance and the exit of a magnetic arc, and their ratio is then plotted versus time. Time variations in this ratio correlate to a possible time variation in the one-way speed of light. A preliminary version of the method, only accounting for the largest magnets in ARC1 of CEBAF, measures the isotropy of the one-way speed light to be less than 10⁻¹¹ or one part in 100 billion, which is less precise than the current recorded value of 10⁻¹⁴. We expect to be able to reach better than 10⁻¹⁴ levels of precision in future studies with this method.
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