Lateral Distribution Function of EAS Cherenkov Light: Experiment Quest and Corsika Simulation

A new fitting function for the Cherenkov light lateral distribution (LDF)in Extensive Air Showers is obtained from the analysis of the data of QUEST experiment at the EAS-TOP array and the CORSIKA simulation code, in the range of distances 0 to 250 m from the shower axis. The proposed LDF consists of two branches and contains a single shape parameter (P ), which is given by the ratio of the light fluxes at 100 m and 200 m from the axis. Parameter pdep ends only up on the relative position of the shower maximum for any primary nucleus, arrival direction and primary energy.