New Limits on Planck Scale Lorentz Violation in QED
Abstract
Constraints on possible Lorentz symmetry violation (LV) of order E/M_{Planck} for electrons and photons in the framework of effective field theory (EFT) are discussed. Using (i) the report of polarized MeV emission from GRB021206 and (ii) the absence of vacuum Čerenkov radiation from synchrotron electrons in the Crab Nebula, we improve previous bounds by 10^{10} and 10^{2}, respectively. We also show that the LV parameters for positrons and electrons are different, discuss electron helicity decay, and investigate how prior constraints are modified by the relations between LV parameters implied by EFT.
 Publication:

Physical Review Letters
 Pub Date:
 July 2004
 DOI:
 10.1103/PhysRevLett.93.021101
 arXiv:
 arXiv:astroph/0309681
 Bibcode:
 2004PhRvL..93b1101J
 Keywords:

 98.70.Rz;
 04.60.m;
 11.30.Cp;
 12.20.Fv;
 gammaray sources;
 gammaray bursts;
 Quantum gravity;
 Lorentz and Poincare invariance;
 Experimental tests;
 Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 4 pages