Cosmic ray anisotropies at high energies

Details Cosmic ray anisotropies at high energies Cosmic ray anisotropies at high energies

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icrc....9..535m&link_type=abstract

In NASA. Goddard Space Flight Center Nineteenth International Cosmic Ray Conference. Conference Papers: Invited Rapporteur, High

Computer Science

Anisotropy, Cosmic Rays, Energetic Particles, Lorentz Transformations, Relativistic Particles, Inertial Reference Systems, Particle Energy, Rotation, Wigner Coefficient

Scientific paper

The directional anisotropies of the energetic cosmic ray gas due to the relative motion between the observers frame and the one where the relativistic gas can be assumed isotropic is analyzed. The radiation fluxes formula in the former frame must follow as the Lorentz invariance of dp/E, where p, E are the 4-vector momentum-energy components; dp is the 3-volume element in the momentum space. The anisotropic flux shows in such a case an amplitude, in a rotating earth, smaller than the experimental measurements from say, EAS-arrays for primary particle energies larger than 1.E(14) eV. Further, it is shown that two consecutive Lorentz transformations among three inertial frames exhibit the violation of dp/E invariance between the first and the third systems of reference, due to the Wigner rotation. A discussion of this result in the context of the experimental anisotropic fluxes and its current interpretation is given.

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