Gluons in proton and soft pp collisions at high energies

TL;DR

This paper analyzes high-energy proton-proton collisions using a soft QCD model, incorporating unintegrated gluon distributions, to explain the increase in hadron production and multiplicity observed at LHC energies.

Contribution

It introduces the inclusion of unintegrated gluon distributions in the quark-gluon string model for better understanding of hadron spectra in high-energy pp collisions.

Findings

Inclusive spectra increase with gluon transverse momentum

Multiplicity of hadrons rises at LHC energies

Unintegrated gluon distribution impacts central rapidity region

Abstract

The hadron inclusive spectra in pp collisions at high energies are analyzed within a soft QCD model, namely the quark-gluon string model. In addition to the sea quark distribution in the incoming proton we consider also the unintegrated gluon distribution that has an increasing behaviour when the gluon transverse momentum grows. It leads to an increase of the inclusive spectra of hadrons and their multiplicity in the central rapidity region of pp collision at LHC energies.