Wolfgang Lukas (University of Innsbruck)
Inclusive charged-particle measurements at hadron colliders probe the low-energy non-perturbative region of QCD. The ATLAS collaboration has measured the 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 8TeV and 13TeV. The new precise measurements at 8 TeV cover a wide spectrum using charged-particle selections with minimum transverse momentum of both 100MeV and 500MeV and in various phase space regions of low and high charged particle multiplicities. The measurements at 13 TeV present the first detailed studies with a minimum transverse momentum of 500MeV and, if available, will be extended to a lower threshold of 100 MeV. The measurements are compared with predictions of various MC generators and are found to provide strong constraints on these.
Dr Elizaveta Shabalina (University of Gottingen)