Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 15: Schwerionenkollisionen und QCD Phasen III
HK 15.2: Vortrag
Dienstag, 22. März 2011, 14:30–14:45, HS AP
Heavy quarks in the Quark Gluon Plasma — •Hendrik van Hees — Institut für Theoretische Physik, Universität Giessen, Germany
Heavy quarks are valuable probes for the Quark-Gluon Plasma (QGP), formed in relativistic heavy-ion collisions since they are produced in the very early hard collisions and then interact with the equilibrated light quarks and gluons during the entire lifetime of the fireball.
In this talk I will discuss a model, where the large heavy-quark (HQ) diffusion within the QGP is described by a Langevin simulation [1]. The pertinent drag and diffusion coefficients are derived from a self-consistent many-body Brückner scheme, using input from lattice QCD for the in-medium HQ potential [2]. Hadronization to open-charm/bottom mesons is described as a combined coalescence-fragmentation process. The subsequent semileptonic decay of the D and B mesons allow a comparison of single-electron pT-spectra with data on the nuclear-suppression factor, RAA, and elliptic flow, v2, of “non-photonic electrons” in semi-central Au-Au collisions with √s=200 A GeV at the Relativistic Heavy-Ion Collider (RHIC). Some conclusions on transport properties (η/s) of the QGP are drawn.
Gefördert durch BMBF.
[1] H. van Hees, M. Mannarelli, V. Greco, R. Rapp, Phys. Rev. Lett. 100, 192301 (2008).
[2] F. Riek, R. Rapp, Phys. Rev. C 82, 035201 (2010).