Centrality dependent long-range angular correlations of intermediate-pT D-mesons and charged particles in pPb collisions at the LHC energy

TL;DR

This study investigates the centrality-dependent long-range angular correlations between D-mesons and charged particles in high-multiplicity pPb collisions at the LHC, suggesting collective behaviour possibly due to thermalized partonic matter.

Contribution

It provides the first detailed analysis of D-meson and charged particle correlations in pPb collisions using hydrodynamic modeling, highlighting the emergence of ridge-like structures.

Findings

Ridge-like structures observed in D-meson and charged particle correlations.

Correlation patterns depend on collision centrality and particle transverse momentum.

Hydrodynamic models reproduce key features of the observed correlations.

Abstract

The high-multiplicity events of pPb collisions at $\sqrt s_{NN}$ = 5.02 TeV at the LHC exhibit unforeseen collective behaviour. One of the possible explanations to the collectivity could be the formation of thermalized partonic matter, like the one formed in relativistic nucleus-nucleus collisions and is described by the hydrodynamic models. This article presents a study on the centrality dependent long-range 2 < $|\Delta\eta|$ < 4 two-particle azimuthal correlations of D-mesons and charged particles in pPb collisions at $\sqrt s_{NN}$ = 5.02 TeV. The study has been conducted on the events, generated with the EPOS3 hydrodynamic code that reproduces most of the features of the pPb data at the LHC energy. There appears a ridge-like structure in the long-range two-particle angular correlations of D-mesons, in the intermediate pT -range, and charged particles in the simulated high-multiplicity pPb events.