Analysis on origin of oscillation of H moment in high-energy hh collision

Multiplicity distributions of negative binomial distribution (NBD) and modi fied NBD are obtained from it birth process model with an immigration. The ratio of factorial cumulant moment to factorial moment, i.e., H moment is c alculated from different multiplicity distributions of NBD, modified NBD an d the three fireball model, which shows an oscillatory behavior when there is a truncation of multiplicity. The oscillation of H moment is related to the common character of the truncated multiplicity distributions.