Charged-Particle Multiplicity Distributions over a Wide Pseudorapidity Range in Proton-Proton Collisions with ALICE

TL;DR

This paper reports the first measurements of charged-particle multiplicity distributions over a wide pseudorapidity range in proton-proton collisions at LHC energies, using ALICE detectors, and compares the results with Monte Carlo simulations and the IP-Glasma model.

Contribution

It provides novel measurements of multiplicity distributions over an extended pseudorapidity range at multiple energies, enhancing understanding of particle production in pp collisions.

Findings

Distributions measured over $-3.4<ta<5.0$ range.

Results compared with Monte Carlo simulations.

Data compared with IP-Glasma model predictions.

Abstract

Multiplicity distributions of charged particles for pp collisions at LHC Run 1 energies, from $\sqrt{s}=$ 0.9 to 8 TeV are measured over a wide pseudorapidity range ($-3.4<\eta<5.0$) for the first time. The results are obtained using the Forward Multiplicity Detector and the Silicon Pixel Detector within ALICE. The results are compared to Monte Carlo simulations, and to the IP-Glasma model.