/ Experiment-HEP arXiv:1005.5230

Limits on light-speed anisotropies from Compton scattering of high-energy electrons

Bocquet, J.-P. (LPSC, Grenoble) ; Moricciani, D. (INFN, Rome) ; Bellini, V. (INFN, Catania) ; Beretta, M. (Frascati) ; Casano, L. (INFN, Rome) ; D'Angelo, A. (INFN, Rome) ; Di Salvo, R. (INFN, Rome) ; Fantini, A. (INFN, Rome) ; Franco, D. (INFN, Rome) ; Gervino, G. (INFN, Turin) ; Ghio, F. (INFN, Rome) ; Giardina, G. (INFN, Catania) ; Girolami, B. (INFN, Rome) ; Giusa, A. (INFN, Catania) ; Gurzadyan, V.G. (Yerevan State U.) ; Kashin, A. (Yerevan Phys. Inst.) ; Knyazyan, S. (Yerevan Phys. Inst.) ; Lapik, A. (Dubna, JINR) ; Lehnert, R. (Mexico U., ICN) ; Levi Sandri, P. (Frascati) ; Lleres, A. (LPSC, Grenoble) ; Mammoliti, F. (INFN, Catania) ; Mandaglio, G. (INFN, Catania) ; Manganaro, M. (INFN, Catania) ; Margarian, A. (Yerevan Phys. Inst.) ; Mehrabyan, S. (Yerevan Phys. Inst.) ; Messi, R. (INFN, Rome) ; Nedorezov, V. (Dubna, JINR) ; Perrin, C. (LPSC, Grenoble) ; Randieri, C. (INFN, Catania) ; Rebreyend, D. (LPSC, Grenoble) ; Rudnev, N. (Dubna, JINR) ; Russo, G. (INFN, Catania) ; Schaerf, C. (INFN, Rome) ; Sperduto, M.L. (INFN, Catania) ; Sutera, M.C. (INFN, Catania) ; Turinge, A. (Dubna, JINR) ; Vegna, V. (INFN, Rome)

Published in: Phys.Rev.Lett.
Year: 2010
Vol.: 104
Page No: 241601
Pages: 4

Abstract: The possibility of anisotropies in the speed of light relative to the limiting speed of electrons is considered. The absence of sidereal variations in the energy of Compton-edge photons at the ESRF's GRAAL facility constrains such anisotropies representing the first non-threshold collision-kinematics study of Lorentz violation. When interpreted within the minimal Standard-Model Extension, this result yields the two-sided limit of 1.6 x 10^{-14} at 95% confidence level on a combination of the parity-violating photon and electron coefficients kappa_{o+} and c. This new constraint provides an improvement over previous bounds by one order of magnitude.

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Note: Long author list - awaiting processing

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