Astroparticle Theory: Some New Insights into High Energy Cosmic Rays

Details Astroparticle Theory: Some New Insights into High Energy Cosmic Rays Astroparticle Theory: Some New Insights into High Energy Cosmic Rays

2003-10-14

arxiv.org/abs/astro-ph/0310367v1

Int.J.Mod.Phys.A19:1133-1141,2004

Astronomy and Astrophysics

Astrophysics

10 pp. Plenary talk at the International Lepton-Photon Conference, Fermilab, August 11-16 2003

Scientific paper

10.1142/S0217751X04019044

Some new developments obtained in the last few years concerning the propagation of high energy cosmic rays are discussed. In particular, it is shown how the inclusion of drift effects in the transport diffusion equations leads naturally to an explanation for the knee, for the second knee and for the observed behavior of the composition and anisotropies between the knee and the ankle. It is shown that the trend towards a heavier composition above the knee has significant impact on the predicted neutrino fluxes above $10^{14}$ eV. The effects of magnetic lensing on the cosmic rays with energies above the ankle are also discussed, analyzing the main features of the different regimes that appear between the diffusive behavior that takes place at lower energies and the regime of small deflections present at the highest ones.

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