A model for the transport of muons in extensive air showers
  In this article we identify the key elements that govern the propagation of muons from the production in extensive air showers to ground. We describe a model based on simple assumptions that propagates the muons starting from the few relevant distributions at production. We compare the results to the ground distributions given by a full air shower Monte Carlo. This study is motivated by the need of modeling the muon component in extensive air showers with the goal of experimentally reconstructing their distributions at production, which act as a footprint of the hadronic cascade. 
L. Cazon, R. Concei\c{c}\~ao, M. Pimenta, E. Santos
astro-ph.HE hep-ph