# Limits on Isotropic Lorentz Violation in QED from Collider Physics

 Title: Limits on Isotropic Lorentz Violation in QED from Collider Physics Author: Walsworth, Ronald L.; Hohensee, Michael A.; Lehnert, Ralph; Phillips, David Forrest Note: Order does not necessarily reflect citation order of authors. Citation: Hohensee, Michael A., Ralph Lehnert, David Forrest Phillips, and Ronald L. Walsworth. 2009. Limits on isotropic Lorentz violation in QED from collider physics. Physical Review-Series D 80(036010). Full Text & Related Files: Walsworth_ Limits Isotropic Lorentz.pdf (304.4Kb; PDF) Abstract: We consider the possibility that Lorentz violation can generate differences between the limiting velocities of light and charged matter. Such effects would lead to efficient vacuum Cherenkov radiation or rapid photon decay. The absence of such effects for 104.5 GeV electrons at the Large Electron Positron collider and for 300 GeV photons at the Tevatron therefore constrains this type of Lorentz breakdown. Within the context of the standard-model extension, these ideas imply an experimental bound at the level of -5.8 x 10^{-12} <= \tilde{\kappa}_{tr}-(4/3)c_e^{00} <= 1.2 x 10^{-11} tightening existing laboratory measurements by 3-4 orders of magnitude. Prospects for further improvements with terrestrial and astrophysical methods are discussed. Published Version: doi:10.1103/PhysRevD.80.036010 Other Sources: http://arxiv.org/abs/0809.3442v2 Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4322935 Downloads of this work: