D-Dbar Correlations as a sensitive probe for thermalization in high-energy nuclear collisions

Details D-Dbar Correlations as a sensitive probe for thermalization in high-energy nuclear collisions D-Dbar Correlations as a sensitive probe for thermalization in high-energy nuclear collisions

2006-04-20

arxiv.org/abs/hep-ph/0604178v2

Phys.Lett.B647:366-370,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 4 figures. Version accepted for publication in Phys.Lett.B

Scientific paper

10.1016/j.physletb.2007.01.072

We propose to measure azimuthal correlations of heavy-flavor hadrons to address the status of thermalization at the partonic stage of light quarks and gluons in high-energy nuclear collisions. In particular, we show that hadronic interactions at the late stage cannot significantly disturb the initial back-to-back azimuthal correlations of DDbar pairs. Thus, a decrease or the complete absence of these initial correlations does indicate frequent interactions of heavy-flavor quarks and also light partons in the partonic stage, which are essential for the early thermalization of light partons.

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