Heavy flavors in AA collisions: production, transport and final spectra

被引:0
作者
W. M. Alberico
A. Beraudo
A. De Pace
A. Molinari
M. Monteno
M. Nardi
F. Prino
M. Sitta
机构
[1] Sezione di Torino,Istituto Nazionale di Fisica Nucleare
[2] Università di Torino,Dipartimento di Fisica
[3] CERN,Physics Department, Theory Unit
[4] Gruppo Collegato INFN,Dipartimento di Scienze e Innovazione Tecnologica dell’Università del Piemonte Orientale
来源
The European Physical Journal C | 2013年 / 73卷
关键词
Heavy Quark; Transport Coefficient; Heavy Flavor; Elliptic Flow; Nuclear Modification Factor;
D O I
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中图分类号
学科分类号
摘要
A multi-step setup for heavy-flavor studies in high-energy nucleus-nucleus (AA) collisions—addressing within a comprehensive framework the initial \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$Q\overline{Q}$\end{document} production, the propagation in the hot medium until decoupling and the final hadronization and decays—is presented. The initial hard production of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$Q\overline{Q}$\end{document} pairs is simulated using the POWHEG pQCD event generator, interfaced with the PYTHIA parton shower. Outcomes of the calculations are compared to experimental data in pp collisions and are used as a validated benchmark for the study of medium effects. In the AA case, the propagation of the heavy quarks in the medium is described in a framework provided by the relativistic Langevin equation. For the latter, different choices of transport coefficients are explored (either provided by a perturbative calculation or extracted from lattice-QCD simulations) and the corresponding numerical results are compared to experimental data from RHIC and the LHC. In particular, outcomes for the nuclear modification factor RAA and for the elliptic flow v2 of D/B mesons, heavy-flavor electrons and non-prompt J/ψ’s are displayed.
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