Heavy and light hadron production and D-hadron correlation in relativistic heavy-ion collisions

Shanshan Cao,Tan Luo,Yayun He,Guang-You Qin,Xin-Nian Wang

doi:10.1016/j.nuclphysa.2017.05.086

Abstract

We establish a linear Boltzmann transport (LBT) model coupled to hydrodynamical background to study hard parton evolution in heavy-ion collisions. Both elastic and inelastic scatterings are included in our calculations; and heavy and light flavor partons are treated on the same footing. Within this LBT model, we provide good descriptions of heavy and light hadron suppression and anisotropic flow in heavy-ion collisions. Angular correlation functions between heavy and light flavor hadrons are studied for the first time and shown able to quantify not only the amount of heavy quark energy loss, but also how the parton energy is re-distributed in parton showers.

Highlights

Heavy quarks and high pT light partons serve as excellent probes of the quark-gluon plasma (QGP) matter created in ultrarelativistic heavy-ion collisions [1, 2]
For v3 on the other hand, it is significant at low pT but is consistent with zero at high pT
While single hadron observables (RAA and v2) nicely quantify the amount of parton energy loss, in order to investigate the detailed energy loss mechanism and how this lost energy is re-distributed in parton showers, one needs correlation functions

Summary

Introduction

Heavy quarks and high pT light partons serve as excellent probes of the quark-gluon plasma (QGP) matter created in ultrarelativistic heavy-ion collisions [1, 2]. We establish a linear Boltzmann transport (LBT) model that treats the in-medium evolution of heavy and light flavor partons on the same footing Within this approach, a simultaneous description of heavy and light flavor hadron RAA is naturally obtained for various collision systems at RHIC and the LHC. The total scattering probability is Patot = Pael + Painel − PaelPainel Based on these probabilities, the Monte-Carlo (MC) method is applied to determine whether a given jet parton is scattered with the medium constituents at each time step, and whether the scattering is pure elastic or inelastic. With the extracted αs from the model-to-data comparison, we calculate and present in Fig. 2 the temperature dependence of the transport coefficients qfor gluon, light quark and charm quark They are consistent with the values constrained by the JET Collaboration [2] for quark jet at 10 GeV. For v3 on the other hand, it is significant at low pT but is consistent with zero at high pT

D-hadron correlation function

Summary