Pseudorapidity and transverse-momentum distributions of charged particles in proton-proton collisions at $\mathbf{\sqrt{\textit s}}$ = 13 TeV

TL;DR

This paper measures the pseudorapidity and transverse-momentum distributions of charged particles in proton-proton collisions at 13 TeV, providing detailed data and comparisons with Monte Carlo models to enhance understanding of particle production mechanisms.

Contribution

It presents new measurements of charged particle distributions at 13 TeV and compares them with theoretical models, improving the understanding of particle production in high-energy collisions.

Findings

Pseudorapidity density in $|eta|<$ 0.5 is 5.31 and 6.46 for different event classes.

Transverse-momentum distribution measured for 0.15 < $p_T$ < 20 GeV/c.

Correlation between $p_T$ and multiplicity studied and compared with models.

Abstract

The pseudorapidity ($\eta$) and transverse-momentum ($p_{\rm T}$) distributions of charged particles produced in proton-proton collisions are measured at the centre-of-mass energy $\sqrt{s}$ = 13 TeV. The pseudorapidity distribution in $|\eta|<$ 1.8 is reported for inelastic events and for events with at least one charged particle in $|\eta|<$ 1. The pseudorapidity density of charged particles produced in the pseudorapidity region $|\eta|<$ 0.5 is 5.31 $\pm$ 0.18 and 6.46 $\pm$ 0.19 for the two event classes, respectively. The transverse-momentum distribution of charged particles is measured in the range 0.15 $<$ $p_{\rm T}$ $<$ 20 GeV/c and $|\eta|<$ 0.8 for events with at least one charged particle in $|\eta|<$ 1. The correlation between transverse momentum and particle multiplicity is also investigated by studying the evolution of the spectra with event multiplicity. The results are compared with calculations from PYTHIA and EPOS Monte Carlo generators.