Calculation of the Cherenkov light yield from low energetic secondary   particles accompanying high-energy muons in ice and water with Geant 4   simulations
  In this work we investigate and parameterize the amount and angular distribution of Cherenkov photons, which are generated by low-energy secondary particles (typically $\lesssim 500 $\,MeV), which accompany a muon track in water or ice. These secondary particles originate from small energy loss processes. We investigate the contributions of the different energy loss processes as a function of the muon energy and the maximum transferred energy. For the calculation of the angular distribution we have developed a generic transformation method, which allows us to derive the angular distribution of Cherenkov photons for an arbitrary distribution of track directions and their velocities. 
Leif R\"adel, Christopher Wiebusch
astro-ph.IM astro-ph.HE physics.ins-det