Influence of hadronic bound states above $T_c$ on heavy-quark observables in Pb+Pb collisions at LHC - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2013

Influence of hadronic bound states above $T_c$ on heavy-quark observables in Pb+Pb collisions at LHC

Marlene Nahrgang
Joerg Aichelin
Klaus Werner

Abstract

We investigate how the possible existence of hadronic bound states above the deconfinement transition temperature $T_c$ affects heavy-quark observables like the nuclear modification factor, the elliptic flow and azimuthal correlations. Lattice QCD calculations suggest that above $T_c$ the effective degrees of freedom might not be exclusively partonic but that a certain fraction of hadronic degrees of freedom might already form at higher temperatures. This is an interesting questions by itself but also has a strong influence on other probes of the strongly interacting matter produced in ultrarelativistic heavy-ion collisions. A substantial fraction of hadronic bound states above $T_c$ reduces on average the interaction of the heavy quarks with colored constituents of the medium. We find that all studied observables are highly sensitive to the active degrees of freedom in the quark-gluon plasma.

Dates and versions

in2p3-00835768 , version 1 (19-06-2013)

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Marlene Nahrgang, Joerg Aichelin, Pol-Bernard Gossiaux, Klaus Werner. Influence of hadronic bound states above $T_c$ on heavy-quark observables in Pb+Pb collisions at LHC. Physical Review C, 2013, 89, pp.014905. ⟨10.1103/PhysRevC.89.014905⟩. ⟨in2p3-00835768⟩
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