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| Titre : |
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Physics Opportunities Above the Greisen-Zatsepin-Kuzmin Cutoff: Lorentz Symmetry Violation at the Planck Scale |
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| Auteur : |
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L. Gonzalez-Mestres1, 2 |
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| Résumé : |
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Special relativity has been tested at low energy with great accuracy, but these results cannot be extrapolated to very high-energy phenomena: this new domain of physics may actually provide the key to the, yet unsettled, question of the ether and the absolute rest frame. Introducing a critical distance scale, a, below 10E-25 cm (the wavelength scale of the highest-energy observed cosmic rays) allows to consider models, compatible with standard tests of special relativity, where a small violation of Lorentz symmetry (a can, for instance, be the Planck length) leads to a deformed relativistic kinematics (DRK) producing dramatic effects on the properties of very high-energy cosmic rays. For instance, the Greisen-Zatsepin-Kuzmin (GZK) cutoff does no longer apply and particles which are unstable at low energy (neutron, some hadronic resonances like the Delta++, possibly several nuclei...) become stable at very high energy. In these models, an absolute local rest frame exists (the vacuum rest frame, VRF) and special relativity is a low-momentum limit. We discuss the possible effects of Lorentz symmetry violation (LSV) on kinematics and dynamics, as well as the cosmic-ray energy range (well below the energy scale associated to the fundamental length) and experiments (on earth and from space) where they could be detected. |
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| Type de publication : |
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Conférences invitées |
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Date de publication
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1997 |
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| Nom du colloque : |
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Workshop on "Observing Giant Cosmic Ray Air Showers for > 10E20 eV Particles from Space" |
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| Pays du colloque : |
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États-Unis |
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| Date du colloque (début) : |
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13/11/1997 |
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| Date du colloque (fin) : |
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15/11/1997 |
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| Commentaire : |
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11 pages, LaTeX, requires aipproc.sty; invited talk at the Workshop on "Observing Giant Cosmic Ray Air Showers for > 10E20 eV Particles from Space", Univ. of Maryland, Nov 13-15, 1997 |
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