Heavy-quark Langevin dynamics and single-electron spectra in nucleus-nucleus collision
Abstract
The stochastic dynamics of heavy quarks in the fireball produced in heavy-ion collisions is followed through numerical simulations based on the Langevin equation. The modification of the final p_T spectra (R_AA) of c and b quarks, hadrons and single-electrons with respect to pp collisions is studied. The transport coefficients are evaluated treating separately the contribution of soft and hard collisions. The initial heavy-quark spectra are generated according to NLO-pQCD, accounting for nuclear effects through recent nPDFs. The evolution of the medium is obtained from the output of two hydro-codes (ideal and viscous). The heavy-quark fragmentation into hadrons and their final semileptonic decays are implemented according to up to date experimental data. A comparison with RHIC data for non-photonic electron spectra is given.
Keywords
Cite
@article{arxiv.1007.4170,
title = {Heavy-quark Langevin dynamics and single-electron spectra in nucleus-nucleus collision},
author = {W. M. Alberico and A. Beraudo and A. De Pace and A. Molinari and M. Monteno and M. Nardi and F. Prino},
journal= {arXiv preprint arXiv:1007.4170},
year = {2011}
}
Comments
4 pages, 3 figures, Talk given at "Hot Quarks 2010", 21th-26th June 2010