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The age parameter in giant EAS
Capdevielle J.N., Cohen F., Sanosyan K.
Dans International Journal of Modern Physics A - 19th European Cosmic Ray Symposium, Florence : Italie - http://hal.in2p3.fr/in2p3-00024819
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
The age parameter in giant EAS
J.N. Capdevielle1, F. Cohen1, K. Sanosyan
1 :  PCC - Physique Corpusculaire et Cosmologie - Collège de France
CNRS : UMR7553 – IN2P3 – Université Paris VII - Paris Diderot
11, place Marcelin Berthelot - 75231 Paris Cedex 05
The age parameter from the longitudinal development can be used to describe the lateral distribution in giant EAS up to 5km from the axis, even if the scaling properties of Approximation B in cascade theory fail after $3.5$ Moliere radii. A set of analytic descriptions is proposed under the gaussian hypergeometric formalism replacing the Eulerian formalism of the classical NKG distribution, valid for electrons, muons and vertical equivalent muons (v.e.m.).

Communications avec actes
International Journal of Modern Physics A
20, No. 29

19th European Cosmic Ray Symposium

PCC 04 82/Conf