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arXiv · 1910.08969

Particle production as a function of system size and underlying-event activity measured with ALICE at the LHC

Mario Krüger
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Abstract

High-energy collisions in ALICE allow for the study of soft and hard QCD particle production. The correlation between transverse momentum spectra and event multiplicity is a sensitive observable providing insights into the different production mechanisms. In these proceedings we report on this observable for unidentified charged-particles, obtained using a 2d-unfolding procedure. Particle production is compared at different collision energies, as well as for pp, p--Pb and Pb--Pb collisions at the same energy. In order to understand the role of autocorrelations in small systems, it was proposed to exploit the usage of the underlying event as a multiplicity estimator to factorize the hardest and the softer components of the events. For this purpose, in these proceedings the charged particle transverse momentum distributions are also presented as a function of underlying-event activity in pp collisions.

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Mario Krüger. 2019-10-20. Particle production as a function of system size and underlying-event activity measured with ALICE at the LHC. https://arxiv.org/abs/1910.08969

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