Oscillations of factorial cumulants to factorial moments ratio from an eikonal approach

We study the factorial moments (FqFq), the factorial cumulants (KqKq) and the ratio of KqKq to FqFq (Hq=Kq/FqHq=Kq/Fq) in pp/pp¯ collisions using an updated approach, in which the multiplicity distribution is related to the eikonal function. The QCD inspired eikonal model adopted contains contributions of quark–quark, quark–gluon and gluon–gluon interactions. Our work shows that the approach can reproduce the collision energy dependence of the FqFq moments, correctly predicts that the first minimum of the HqHq lies around q=5q=5 and qualitatively reproduces the oscillations of the HqHq moments, as shown in the experimental data and predicted by QCD at preasymptotic energy. The result of this study seems to indicate that the HqHq oscillations are manifestations of semihard component in the multiparticle production process. Predictions for multiplicity distribution and HqHq moments at the LHC energy of s=14 TeV are presented.