2000/01/28 by Orfeu Bertolami, O. Bertolami · 2 citations
Physics and Astronomy · #Advanced Differential Geometry Research #Neutrino Physics Research #Noncommutative and Quantum Gravity Theories #astro-ph #gr-qc #hep-ph
paper · pdf · doi:10.1016/s0920-5632(00)00753-2
published as Nucl.Phys.Proc.Suppl. 88 (2000) 49-56 · 9 pages, Latex (requires mprocl.sty file available at http://www.aei-potsdam.mpg.de/~cavaglia/qg99/proceedings.html). Invited talk delivered at the Third Meeting on Constrained Dynamics and Quantum Gravity, Villasimius, Sardinia, September 1999
arxiv created 2000/01/28 · openalex publication_date 2000/06/01 · arxiv updated 2009/11/30 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
We show that estimates of the Lorentz symmetry violation extracted from ultra-high energy cosmic rays beyond the GZK cut-off set bounds on the parameters of a Lorentz-violating extension of the Standard Model. Moreover, we argue that correlated measurements of the difference in the arrival time of gamma-ray photons and neutrinos emitted from Active Galactic Nuclei or Gamma-Ray Bursts may provide a signature for a possible violation of the Lorentz symmetry. We find that this time delay is energy independent, but that it has a dependence on the chirality of the particles involved.