Inclusive distributions of charged hadrons in pp collisions at sqrt(s) = 0.9 and 2.36 TeV

TL;DR

This paper reports measurements of charged-hadron distributions in proton-proton collisions at 0.9 and 2.36 TeV, providing new high-energy data on particle production and transverse momentum characteristics.

Contribution

It presents the first measurements of inclusive charged-hadron distributions at 2.36 TeV, extending the energy range of collider data and offering new insights into particle production at high energies.

Findings

Average pT increases with energy.

Pseudorapidity densities are higher at 2.36 TeV.

First high-energy measurements at 2.36 TeV.

Abstract

Measurements of inclusive charged-hadron transverse-momentum (pT) and pseudorapidity (eta) distributions are presented for proton-proton collisions at sqrt(s)=0.9 and 2.36 TeV. For non-single-diffractive interactions, the average pT of charged hadrons is measured to be 0.46+-0.01(stat.)+-0.01(syst.) GeV/c at 0.9 TeV and 0.50+-0.01(stat.)+-0.01(syst.) GeV/c at 2.36 TeV, for |eta|<2.4. At these energies, the measured pseudorapidity densities in the central region, dNch/deta(|eta|<0.5), are 3.48+-0.02(stat.)+-0.13(syst.) and 4.47+-0.04(stat.)+-0.16(syst.), respectively. The results at 2.36 TeV represent the highest-energy measurements ever published at a particle collider at the time of the presentation at the Lake Louise Winter Institute.