Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....2..575g&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
Scientific paper
Using the numerical solution of adjoint cascade equations we analyze characteristics of air showers produced by extremely high energy (EHE) photons taking into account the Landau-Pomeranchuk-Migdal (LPM) effect and the interaction of EHE photons and electrons with the geomagnetic field (GMF). The calculational results on the radial distributions, mean squared radii, angular distributions and mean squared angles of cascade electrons are presented for EHE (1018 ÷ 1021 eV) inclined air showers. The calculations corresp ond to conditions of the southern location of the Auger Observatory. We claim an existence of invariant functions of radial and angular distributions indep endent on the primary photon energy, the shower age and assumptions on the LPM and GMF effects (regarding or disregarding). This feature takes place for both the vertical and inclined air showers. A slight dependence of the invariant function shape on the shower arrival angle is observed at large angles (near 60o ) for the radial distribution.
Goncharov A. I.
Inoue Naoya
Plyasheshnikov A. V.
Serebryakova T. L.
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