Soft multiple parton interactions as seen in multiplicity distributions at Tevatron and LHC

TL;DR

This paper analyzes charged particle multiplicity distributions at Tevatron and LHC energies using the IPPI model, revealing a large and energy-dependent number of soft parton interactions and growth in mean multiplicity, consistent with the QGSM.

Contribution

It demonstrates that the number of soft parton interactions increases with energy and supports the multiladder exchange model (QGSM) as a consistent framework.

Findings

Number of soft parton interactions is large and energy-dependent.

Mean multiplicity per interaction grows with energy.

Results align with the multiladder exchange model (QGSM).

Abstract

We analyse the multiplicity distributions of charged particles at Tevatron (p\bar p) and LHC (pp) energies in the framework of the independent pair parton interactions (IPPI) model. It is shown that the number of soft pair parton interactions (and therefore the density of the partonic medium) is large and increases with energy. The mean multiplicity at each parton interaction grows also with energy. This growth depends on the width of the rapidity window. The similar conclusions are obtained in the multiladder exchange model (QGSM).