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Complete-Coverage Searches for Lorentz Violation in the Minimal Matter Sector

Marshall J. Basson*, Eric Biddulph-West, Caitlyn Holl, Will Lankenau, Facundo Martin Lopez, Bianca Rose Lott, Chihui Shao, Danny P. Shope, Jay D. Tasson† et al.

Zhiyu Zhang

  • Physics and Astronomy Department, Carleton College, Northfield, Minnesota 55057, USA

  • *Present address: Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
  • †Contact author: jtasson@carleton.edu
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Phys. Rev. Lett. 137, 081601 – Published 17 August, 2026

DOI: https://doi.org/10.1103/ckyj-bbfl

Abstract

Over the past several decades, dozens of tests have sought the 132 Lorentz-violating degrees of freedom in the nonrelativistic limit of the minimal matter sector of the standard-model extension, yet 43 remained unconstrained. In this Letter, we limit all previously unconstrained degrees of freedom and make improvements on 13 prior limits. The approach introduced here offers the potential of further improvements for 49 degrees of freedom in suitable future experiments, along with additional discovery potential offered by combining data from experiments performed in different locations.

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Phys. Rev. Lett. 137, 081601– Published 17 August, 2026
  • Received 6 December 2025
  • Accepted 18 May 2026
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