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Universe 2016, 2(4), 30; doi:10.3390/universe2040030

Tests of Lorentz Symmetry in the Gravitational Sector

1
Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA
2
Physics Department, Embry-Riddle Aeronautical University, Prescott, AZ 86301, USA
3
SYRTE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, LNE, 61 avenue de l’Observatoire, 75014 Paris, France
4
Laboratoire Kastler Brossel, ENS-PSL Research University, CNRS, UPMC-Sorbonne Universités, Collège de France, 75005 Paris, France
*
Author to whom correspondence should be addressed.
Academic Editors: Lorenzo Iorio and Elias C. Vagenas
Received: 15 October 2016 / Revised: 21 November 2016 / Accepted: 22 November 2016 / Published: 1 December 2016
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Abstract

Lorentz symmetry is one of the pillars of both General Relativity and the Standard Model of particle physics. Motivated by ideas about quantum gravity, unification theories and violations of CPT symmetry, a significant effort has been put the last decades into testing Lorentz symmetry. This review focuses on Lorentz symmetry tests performed in the gravitational sector. We briefly review the basics of the pure gravitational sector of the Standard-Model Extension (SME) framework, a formalism developed in order to systematically parametrize hypothetical violations of the Lorentz invariance. Furthermore, we discuss the latest constraints obtained within this formalism including analyses of the following measurements: atomic gravimetry, Lunar Laser Ranging, Very Long Baseline Interferometry, planetary ephemerides, Gravity Probe B, binary pulsars, high energy cosmic rays, … In addition, we propose a combined analysis of all these results. We also discuss possible improvements on current analyses and present some sensitivity analyses for future observations. View Full-Text
Keywords: experimental tests of gravitational theories; Lorentz and Poincaré invariance; modified theories of gravity; celestial mechanics; atom interferometry; binary pulsars experimental tests of gravitational theories; Lorentz and Poincaré invariance; modified theories of gravity; celestial mechanics; atom interferometry; binary pulsars
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MDPI and ACS Style

Hees, A.; Bailey, Q.G.; Bourgoin, A.; Pihan-Le Bars, H.; Guerlin, C.; Le Poncin-Lafitte, C. Tests of Lorentz Symmetry in the Gravitational Sector. Universe 2016, 2, 30.

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