How many of the scaling trends in $pp$ collisions will be violated at sqrt{s_NN} = 14 TeV ? - Predictions from Monte Carlo quark-gluon string model

TL;DR

This paper uses the Monte Carlo quark-gluon string model to analyze hadron production in proton-proton collisions up to 14 TeV, predicting scaling behaviors and their violations at LHC energies based on particle correlations and multistring interactions.

Contribution

It provides new predictions for hadron distributions at 14 TeV and explains the mechanisms behind the scaling violations observed at high energies.

Findings

Feynman and extended longitudinal scaling hold at fragmentation regions.

Strong violation of Feynman and KNO scaling at midrapidity.

Scaling violations are linked to short-range particle correlations and multistring dynamics.

Abstract

Multiplicity, rapidity and transverse momentum distributions of hadrons produced both in inelastic and nondiffractive $pp$ collisions at energies from $\sqrt{s} = 200$\,GeV to 14\,TeV are studied within the Monte Carlo quark-gluon string model (QGSM). Good agreement with the available experimental data up to $\sqrt{s} = 13$\,TeV is obtained, and predictions are made for the collisions at top LHC energy $\sqrt{s} = 14$\,TeV. The model indicates that Feynman scaling and extended longitudinal scaling remain valid in the fragmentation regions, whereas strong violation of Feynman scaling is observed at midrapidity. The Koba-Nielsen-Olesen (KNO) scaling in multiplicity distributions is violated at LHC also. The origin of both maintenance and violation of the scaling trends is traced to short range correlations of particles in the strings and interplay between the multistring processes at ultrarelativistic energies.