Ultrahigh-energy cosmic rays and symmetries of space-time

Dec, 2000
5 pages
Published in:
  • Gen.Rel.Grav. 34 (2002) 707-713
e-Print:
Report number:
  • DF-IST-6-2000

Citations per year

200120052009201320150246810
Abstract: (arXiv)
High energy cosmic rays allow probing phenomena that are inacessible to accelerators. Observation of cosmic rays, presumebly protons, with energies beyond 4×1019eV4 \times 10^{19} eV, the so-called Greisen-Zatsepin-Kuzmin (GZK) cut-off, give origin to two puzzles: How do particles accelerate to such energies ? Are their sources within 50100Mpc50 - 100 Mpc from Earth, or Lorentz invariance is actually a broken symmetry ?
Note:
  • Comment, 5 pages, plain Latex Report-no: DF/IST-6.2000
  • p: cosmic radiation
  • cosmic radiation: acceleration
  • cosmic radiation: particle source
  • violation: Lorentz
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