Heavy-quark azimuthal momentum correlations as a sensitive probe of thermalization

Details Heavy-quark azimuthal momentum correlations as a sensitive probe of thermalization Heavy-quark azimuthal momentum correlations as a sensitive probe of thermalization

2009-08-04

arxiv.org/abs/0908.0427v3

Nucl.Phys.A858:86-94,2011

Physics

Nuclear Physics

Nuclear Experiment

7 pages, 5 figs.; accepted for publication in Nucl. Phys. A

Scientific paper

10.1016/j.nuclphysa.2011.03.013

In high-energy nuclear collisions the degree of thermalization at the partonic level is a key issue. Due to their large mass, heavy quarks and their possible participation in the collective flow of the QCD-medium constitute a powerful probe for thermalization. We present studies with PYTHIA for p+p collisions at the top LHC energy of $\sqrt{s}$ = 14 TeV applying the two-particle transverse momentum correlator $<\Delta p_{t,1}, \Delta p_{t,2}>$ to pairs of heavy-quark hadrons and their semi-leptonic decay products as a function of their relative azimuth. Modifications or even the complete absence of initially existing correlations in Pb+Pb collisions might indicate thermalization at the partonic level.

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