Abstract:

Charged-particle multiplicity distributions and their average transverse momentum on the normalized multiplicity, the KNO-scale, at the energies of 0.9—13 TeV were compared. The results obtained by the ATLAS Collaboration in proton-proton collisions with the centre-of-mass energies from 0.9 TeV to 13 TeV for absolute pseudorapidity less than 2.5 and the transverse momentum greater than 100 MeV and 500 MeV were used in this study. The shape evolution of multiplicity distributions depending on the energy was studied in terms of KNO scaling variables. Charged-particle multiplicity distributions on the KNO scale have the same shape and decrease with the energy increase. The KNO distributions at the highest energies tend to be energy independent. The mean transverse momentum on the KNO scale has a similar shape and increases with the energy increase.