Pseudo-rapidity Distributions of Charged Hadrons in pp and pA Collisions at the LHC

TL;DR

This paper models charged hadron distributions in proton-proton and proton-nucleus collisions at the LHC using the Color Glass Condensate framework, fitting data and making predictions for future collisions.

Contribution

It applies the UGD function from the GBW model within the CGC framework to analyze and predict multiplicity distributions at LHC energies.

Findings

Good agreement with CMS data at various energies

Normalization factor determined from data fitting

Predicted multiplicity distributions for p+Pb collisions at 4.4 TeV

Abstract

In the framework of Color Glass Condensate, the pseudo-rapidity distributions of charged hadrons in pp and pA collisions at the LHC are studied with the UGD function from the GBW model. With a $\chi^{2}$ analysis of the CMS data in pp collisions at $\sqrt{s}=0.9,~2.36,~7$ TeV, the normalization factor is obtained and the theoretical results are in good agreement with the perimental data. Then, considering the influence of nucleon hard partons distribution on the number of participants in pA collisions by a Glauber Monte Carlo method, we give the predictive results for the multiplicity distributions in p+Pb collisions at $\sqrt{s}=4.4$ TeV.