Hadron spectra, flow and correlations in PbPb collisions at the LHC: interplay between soft and hard physics

TL;DR

This paper analyzes PbPb collision data at the LHC using the HYDJET++ model to explore how hard and soft processes influence bulk properties like spectra, flow, and correlations in high-temperature QCD matter.

Contribution

It introduces a detailed analysis of LHC heavy ion data with a focus on the interplay between jet production and bulk observables using the HYDJET++ model.

Findings

Jet production significantly affects hadron spectra and flow.

The model reproduces key features of LHC data.

Hard processes influence femtoscopic correlations.

Abstract

The started LHC heavy ion program makes it possible to probe new frontiers of the high temperature Quantum Chromodynamics. It is expected that the role of hard and semi-hard particle production processes may be significant at ultra-high energies even for bulk properties of the created matter. In this paper, the LHC data on multiplicity, hadron spectra, elliptic flow and femtoscopic correlations from PbPb collisions at center-of-mass energy 2.76 TeV per nucleon pair are analyzed in the framework of the HYDJET++ model. The influence of the jet production mechanism on these observables is discussed.