Measurement of Minimum Bias Observables with ATLAS

TL;DR

This paper presents new measurements of minimum bias observables at the LHC, providing insights into soft QCD processes and improving simulation models for pileup conditions.

Contribution

It offers novel measurements of charged-particle multiplicity and dependencies at 8 TeV and 13 TeV, enhancing understanding of soft QCD interactions.

Findings

Charged-particle multiplicity distributions measured at two energies.

Dependence of multiplicity on transverse momentum and pseudorapidity.

Data used to refine soft QCD models and pileup simulations.

Abstract

The modelling of minimum bias interactions is a crucial ingredient to learn about the description of soft QCD processes. It has also a significant relevance for the simulation of the environment at the LHC with many concurrent pp interactions (pileup). The ATLAS collaboration has provided new measurements of the inclusive charged-particle multiplicity and its dependence on transverse momentum and pseudorapidity in special data sets with low LHC beam currents, recorded at center of mass energies of 8 TeV and 13 TeV. The measurements use charged-particle selections with minimum transverse momentum of both 100 MeV and 500 MeV, and various phase-space regions characterized by low and high charged-particle multiplicities.