Search for light-speed anisotropies using Compton scattering of high-energy electrons

Based on the high sensitivity of Compton scattering off ultra relativistic electrons, the possibility of anisotropies in the speed of light is investigated. The result discussed in this contribution is based on the gamma-ray beam of the ESRF's GRAAL facility (Grenoble, France) and the search fo...

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Bibliographic Details
Published in:arXiv.org 2010-09
Main Author: Rebreyend, Dominique
Format: Article
Language:English
Subjects:
Anisotropy
Confidence intervals
Constraint modelling
Elastic scattering
Gamma rays
High energy electrons
Photons
Online Access:Get full text
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Summary:Based on the high sensitivity of Compton scattering off ultra relativistic electrons, the possibility of anisotropies in the speed of light is investigated. The result discussed in this contribution is based on the gamma-ray beam of the ESRF's GRAAL facility (Grenoble, France) and the search for sidereal variations in the energy of the Compton-edge photons. The absence of oscillations yields the two-sided limit of 1.6 x 10^{-14} at 95 % confidence level on a combination of photon and electron coefficients of the minimal Standard Model Extension (mSME). This new constraint provides an improvement over previous bounds by one order of magnitude.
ISSN:2331-8422
DOI:10.48550/arxiv.1009.1299