Toward a simultaneous description of RAA and v2 for heavy quarks

15th International Conference on Strangeness in Quark Matter

Das, S.K.^1,2 ; Scardina, F.^1,2 ; Plumari, S.^1,2 ; Greco, V.^1,2

Department of Physics and Astronomy, University of Catania, Via S. Sofia 64, Catania

I- 95125, Italy^1

Laboratori Nazionali Del Sud, INFN-LNS, Via S. Sofia 62, Catania

I-95123, Italy^2

关键词: Boltzmann collision integral;    Elliptic flows;    Hadronization;    Heavy-quark;    Interaction dynamics;    Large parts;    Rescattering;    Temperature dependence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/668/1/012051/pdf
DOI  :  10.1088/1742-6596/668/1/012051

来源: IOP

【 摘 要 】

The two key observables related to heavy quarks that have been measured in RHIC and LHC energies are the nuclear suppression factor RAAand the elliptic flow v2. The Simultaneous description of these two observables is a top challenge for all the existing models. We highlight how a consistent combination of four ingredients i.e., the temperature dependence of the energy loss, the full solution of the Boltzmann collision integral for the momentum evolution of heavy quark, the hadronization by coalescence, and the hadronic rescattering, are responsible to address a large part of such a puzzle. We consider four different models to evaluate the temperature dependence of drag coefficients of the heavy quark in the QGP. All these four different models are set to reproduce the same RAAas of the experiments. We show that for the same RAA, the v2could be quite different depending on the interaction dynamics as well as other ingredients.