Speaker
Dr
Hendrik van Hees
(Goethe University Frankfurt)
Description
Heavy charm and bottom quarks provide an important probe of the
transport properties of the quark-gluon plasma, created in heavy-ion
collisions at the Large Hadron Collider (LHC). They are produced in the
early hard collisions and then interact with the hot and dense medium,
consisting of light quarks and gluons, undergoing a phase transition to
a hot and dense hadron gas. Using a hybrid model of Ultrarelativistic
Molecular Dynamics (UrQMD) and 3D hydrodynamics [1] to simulate the
evolution of the hot and dense medium, we describe heavy-quark
interactions with the medium in terms of a Fokker-Planck/Langevin
framework with drag and diffusion coefficients based on a
Dirac-Brueckner evaluation of the in-medium scattering-matrix elements
using lattice QCD heavy-quark potentials for elastic light-heavy-quark
scattering [2] or a phenomenological resonance-scattering model based on
chiral and heavy-quark effective theory [3] to evaluate the nuclear
modification factor, R_AA, and elliptic flow v_2 of D- and B-mesons in
PbPb collisions at sqrt(s_NN)=2.76 TeV. The results are compared with
recent data from the ALICE collaboration on R_AA and elliptic flow of
single electrons, muond, and D-mesons.
[1] H. Petersen, J. Steinheimer, G. Burau, M. Bleicher, H. Stöcker,
Phys. Rev. C 78, 044901 (2008)
[2] H. van Hees, M. Mannarelli, V. Greco, R. Rapp, Phys. Rev. Lett. 100
(2008), 192301.
[3] H. van Hees, V. Greco, R. Rapp, Phys. Rev. C 73 (2006), 034913.
Primary author
Dr
Hendrik van Hees
(Goethe University Frankfurt)
Co-authors
Mr
Thomas Lang
(Frankfurt Institute of Advanced Studies)
Prof.
marcus Bleicher
(Frankfurt Institute of Advanced Studies)
