Particle production as a function of system size and underlying-event activity measured with ALICE at the LHC
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.
Cite
@article{arxiv.1910.08969,
title = {Particle production as a function of system size and underlying-event activity measured with ALICE at the LHC},
author = {Mario Krüger},
journal= {arXiv preprint arXiv:1910.08969},
year = {2019}
}