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arXiv · 2307.03925

Probe of soft-QCD in minimum bias events of pp collisions with the ATLAS at the LHC

Yuri A. Kulchitsky
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Abstract

The study of the minimum-bias charged-particle distributions is reviewed. The data are obtained using the ATLAS detector at the LHC in proton-proton collisions at the centre-of-mass energies from 0.9 to13 TeV. The particles are required to have an absolute pseudorapidity less than 2.5. For charged-particle distributions study two transverse momentum thresholds cases, greater than 100 MeV and 500 MeV were taken. The charged-particle multiplicity, its dependence on the transverse momentum and pseudorapidity, dependence of the average transverse momentum on the charged-particle multiplicity and the KNO-scaling study are presented. The measured distributions are compared with the predictions of various tunings of Monte Carlo generator, which implement different minimum-bias models.The Monte Carlo model predictions qualitatively describe the data well, but with some significant discrepancies. Measurements of minimum-bias events by the ALICE and CMS Collaborations are presented.

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Yuri A. Kulchitsky. 2023-07-08. Probe of soft-QCD in minimum bias events of pp collisions with the ATLAS at the LHC. https://arxiv.org/abs/2307.03925

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