Heavy-flavor dynamics in nucleus-nucleus collisions: from RHIC to LHC
Abstract
The stochastic dynamics of c and b quarks in the fireball created in nucleus-nucleus collisions at RHIC and LHC is studied employing a relativistic Langevin equation, based on a picture of multiple uncorrelated random collisions with the medium. Heavy-quark transport coefficients are evaluated within a pQCD approach, with a proper HTL resummation of medium effects for soft scatterings. The Langevin equation is embedded in a multi-step setup developed to study heavy-flavor observables in pp and AA collisions, starting from a NLO pQCD calculation of initial heavy-quark yields, complemented in the nuclear case by shadowing corrections, k_T-broadening and nuclear geometry effects. Then, only for AA collisions, the Langevin equation is solved numerically in a background medium described by relativistic hydrodynamics. Finally, the propagated heavy quarks are made hadronize and decay into electrons. Results for the nuclear modification factor R_AA of heavy-flavor hadrons and electrons from their semi-leptonic decays are provided, both for RHIC and LHC beam energies.
Keywords
Cite
@article{arxiv.1107.0256,
title = {Heavy-flavor dynamics in nucleus-nucleus collisions: from RHIC to LHC},
author = {M. Monteno and W. M. Alberico and A. Beraudo and A. De Pace and A. Molinari and M. Nardi and F. Prino},
journal= {arXiv preprint arXiv:1107.0256},
year = {2015}
}
Comments
4 pages, 2 figures (3 eps files); submitted for publication in the proceedings of "Quark Matter 2011", 23-28 May 2011, Annecy (France)