Thème :
Cosmic rays propagation and interaction with matter.
Présentation :
One of the most interesting features on primary cosmic rays is certainly its energy spectrum. The latter has some peculiarities not yet understood, as the change of the slope that occurs at around 3X10¹âµeV, known as the knee of the primary energy spectrum. In order to explain this mystery, several experiments were achieved: Pamir, KASCADE, RUNJOB ... These experiments, using X-ray emulsion chambers, revealed the existence of an unusual phenomenon: the coplanar emission, during which the products of the primary cosmic particle interaction with air, are perfectly aligned. Several theories based on an unconventional physics have been developed to explain this phenomenon. To be better understood, this effect may require the development of new physics. A question arises: would it be a signature of a new multiple production mechanism occurring in high energy nuclear reactions. In this work, we try to reveal the origin of such effect, using Monte Carlo simulations of phenomena that govern the interaction of primary cosmic rays with the atmosphere. These simulations are performed using the CORSIKA code combining different models of high-energy hadronic interaction.