Erraticity analysis of pseudorapidity gaps of the NA27 data

The erraticity analysis of pseudorapidity gaps is performed for the data of 400 GeV/c pp collisions. The entropy-like quantities Sq and Σq proposed by R.C. Hwa et al. have been calculated. It is found that Sq and Σq deviate from 1 significantly. The lnSq versus q has a quite linear behavior, but the lnΣq versus q has only an approximate linear behavior. The same calculations are performed for a Monte-Carlo event sample simulated using the FRITIOF program. It is found that the deviations from the experimental data are rather large.