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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:37 |
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Conference: Bucharest University Faculty of Physics 2007 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
The asymmetry of muon lateral distribution in cosmic ray air showers
Authors:
C. Manailescu(a), C. Morariu(a), H. Rebel(b), O. Sima(a)
Affiliation:
(a)Physics Department, University of Bucharest, Romania
(b)Institüt für Kernphysik, Forschungszentrum Karlsruhe, Germany
E-mail
cristian.manailescu@gmail.com
Keywords:
cosmic rays, air shower, muons lateral distribution
Abstract:
Muons represent an important component of the secondary particles produced in Extensive Air Showers (EAS). As they are less attenuated than electrons, they survive even in the late stages of the EAS development, being easily detected with ground level array detectors. As they are mostly produced in the initial steps of the EAS development, their study can reveal information on the properties of the initial steps and in particular on the high energy interactions. The correlation of electron and muon lateral distributions is a rich source of information about the nature and the energy of the primary cosmic rays In view of these applications it is necessary to develop reliable methods for reconstructing the muon density.
In this work the distribution of the muon density in EAS is studied using extensive air showers simulated with the CORSIKA program for the location of the KASCADE-Grande experiment. The azimuth dependence of miu+ and miu- distributions is dominated by the influence of the magnetic field of the Earth, which acts in opposite directions on miu+ and miu- trajectories; the attenuation effects are less important than in the case of electrons. The azimuth dependence of the miu+ and miu- lateral distributions is studied as a function of the incoming direction of the primary cosmic ray. The azimuth dependence in the observation plane can be parameterized by simple formulas, which are presented in this work.
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