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arXiv · 0908.0427

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

G. Tsiledakis·H. Appelshaeuser·K. Schweda·J. Stachel
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Abstract

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 $<Δp_{t,1}, Δp_{t,2}>$ 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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G. Tsiledakis, H. Appelshaeuser, K. Schweda, J. Stachel. 2011-04-04. Heavy-quark azimuthal momentum correlations as a sensitive probe of thermalization. https://doi.org/10.1016/j.nuclphysa.2011.03.013

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