We present the current version of generator GHOST which can be used in the simulation of Non Diffractive (ND),Non Single Diffractive (NSD), single diffractive (SD) and double diffractive (DD) events at cosmic ray energies.
The generator is based on four-gaussian parameterization of pseudorapidity distribution which is related to the leading cluster approach in distribution of secondary particles. Rapidity and pseudo-rapidity, the charged multiplicity distribution (as well as total multiplicity including neutral secondaries) is derived using the negative binomial distribution as used previously in ISR and LHC. The transverse momenta pt are taken from the power law distribution inserted in CORSIKA code.
Recently we updated the model using lately measured pseudorapidity distributions of neutrons , ‘s and photons by the group of LHCf.
Rapidity and pseudo-rapidity distributions, the average multiplicity and average central densities at √s= 0.2, 1, 7, 8, 13 TeV we obtained and we have provided guide lines for extrapolations above 14 TeV. We observed a possible convergence of the negative binomial distribution in the energy range 8-13 TeV in agreement with by the theoretical limit at ~√s = 40 TeV expected for the SSC …25 years ago.