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CPT and lorentz tests with muons

Bluhm1, Kostelecky, Lane

  • 1Physics Department, Colby College, Waterville, Maine 04901, USA.

Physical Review Letters
|October 4, 2000
PubMed
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Precision experiments with muons can detect Planck-scale CPT and Lorentz violation. Analysis of existing muon data offers new ways to measure these fundamental physics violations.

Area of Science:

  • Particle Physics
  • Quantum Field Theory
  • Fundamental Symmetries

Background:

  • Precision experiments, particularly those involving muons, offer unique sensitivity to subtle violations of fundamental symmetries.
  • Testing the Standard Model of particle physics requires exploring physics at extreme energy scales, such as the Planck scale.
  • The Constrained-Path-Time (CPT) and Lorentz symmetries are cornerstones of modern physics, and their potential violation is a key area of research.

Purpose of the Study:

  • To investigate the potential for detecting Planck-scale CPT and Lorentz violation using precision muon experiments.
  • To establish figures of merit for quantifying the levels of CPT and Lorentz violation detectable with existing muon data.
  • To explore the sensitivity of muonium hyperfine structure and muon anomalous magnetic moment measurements to these fundamental violations.

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Main Methods:

  • Analysis of existing experimental data from muonium ground-state hyperfine structure measurements.
  • Analysis of existing experimental data concerning the muon anomalous magnetic moment.
  • Development of dimensionless figures of merit to quantify CPT and Lorentz violation.

Main Results:

  • Existing muon data can provide unprecedented sensitivity to CPT and Lorentz violation at the Planck scale.
  • Dimensionless figures of merit for CPT violation can be determined at the level of 4x10(-21).
  • Dimensionless figures of merit for Lorentz violation can be determined at the level of 10(-23).

Conclusions:

  • Precision muon experiments are powerful tools for probing fundamental physics beyond the Standard Model.
  • Existing experimental data holds significant untapped potential for constraining CPT and Lorentz symmetry violations.
  • These findings pave the way for new tests of fundamental symmetries in particle physics.