Azimuthal Correlations of D Mesons with Charged Particles in Simulations with the ALICE Experiment

Eszter Frajna,Robert Vertesi

doi:10.3390/particles4040037

Abstract

In this work, we present the results of a component-level analysis with Monte Carlo simulations, which aid the interpretation of recent ALICE results of the azimutal correlation distribution of prompt D mesons with charged hadrons in pp and p–Pb collisions at sNN = 5.02 TeV. Parton-level contributions and fragmentation properties are evaluated. Charm and beauty contributions are compared in order to identify the observables that serve as sensitive probes of the production and hadronisation of heavy quarks.

Highlights

Investigating the characteristic correlation patterns of heavy-flavour particles in ultra-relativistic hadronic collisions can help in improving our understanding of the flavour-dependence of fragmentation mechanisms
The angular correlation between prompt D mesons and charged particles in proton–proton collisions is sensitive to the perturbative quantum chromodynamics (QCD) mechanisms of charm quark production as well as the fragmentation into charm hadrons, and it is affected by initial- and final-state parton radiations (ISRs and FSRs, respectively) as well as multiparton interactions (MPIs)
In order to investigate the mechanisms of particle production and study the event properties of ultra-relativistic hadronic collisions in ALICE, two-particle angular correlations are used

Summary

Introduction

Investigating the characteristic correlation patterns of heavy-flavour (charm and beauty) particles in ultra-relativistic hadronic collisions can help in improving our understanding of the flavour-dependence of fragmentation mechanisms. In order to investigate the mechanisms of particle production and study the event properties of ultra-relativistic hadronic collisions in ALICE, two-particle angular correlations are used. They are especially effective in the pT ranges (pT∼1–3 GeV/c) where jet–medium interactions and semi-hard QCD processes are present and a full jet reconstruction may be problematic [1]. Heavy-flavour correlation measurements in pp collisions serve as a reference for the possible flavour-dependent modification of production and fragmentation by hot or cold nuclear matter in larger systems [2]

Methods

Results

Conclusion