Sibyll with charm
  The cosmic ray interaction event generator Sibyll is widely used in extensive air shower simulations for cosmic ray and neutrino experiments. Charmed particle production has been added to the Monte Carlo with a phenomenological, non-perturbative model that properly accounts for charm production in the forward direction. As prompt decays of charm can become a significant background for neutrino detection, proper simulation of charmed particles is very important. We compare charmed meson and baryon production to accelerator data. 
Eun-Joo Ahn, Ralph Engel, Thomas K. Gaisser, Paolo Lipari, Todor   Stanev
astro-ph.HE hep-ex hep-ph