QCD Challenges from pp to A-A Collisions

Abstract

This paper is a write-up of the ideas that were presented, developed and discussed at the third International Workshop on QCD Challenges from pp to A-A, which took place in August 2019 in Lund, Sweden. The goal of the workshop was to focus on some of the open questions in the field and try to come up with concrete suggestions for how to make progress on both the experimental and theoretical sides. The paper gives a brief introduction to each topic and then summarizes the primary results.

22 pages, 10 figures, write-up of third International Workshop on QCD Challenges from pp to A-A

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• The ALICE experiment: a journey through QCD
• Event Generators for High-Energy Physics Experiments
• Predicting parton energy loss in small collision systems
• Discovering partonic rescattering in light nucleus collisions
• Setting the string shoving picture in a new frame
• Comparative study of the heavy-quark dynamics with the Fokker-Planck Equation and the Plastino-Plastino Equation
• Hanbury Brown--Twiss Interferometry and Collectivity in Small Systems
• The universal scaling of kinetic freeze-out parameters across different collision systems at the LHC energy
• Femtoscopic correlations of identical charged pions and kaons in pp collisions at $\sqrt{s}=13$ TeV with event-shape selection
• Probing the Gluon Plasma with Charm Balance Functions
• Studying strangeness and baryon production mechanisms through angular correlations between charged $\Xi$ baryons and identified hadrons in pp collisions at $\sqrt{s}$ = 13 TeV
• Collective flow in single-hit QCD kinetic theory
• Jet modifications from colour rope formation in dense systems of non-parallel strings
• Investigating jet induced identified hadron productions from the relative transverse activity classifier in pp collision at LHC
• Colliding and Fixed Target Mode in a Single Experiment -- A Novel Approach to Study the Matter under New Extreme Conditions