Jet-Like Correlations between Forward and Mid-Rapidity

Details Jet-Like Correlations between Forward and Mid-Rapidity Jet-Like Correlations between Forward and Mid-Rapidity

2006-10-06

arxiv.org/abs/nucl-ex/0610011v1

Nucl.Phys.A783:157-164,2007

Physics

Nuclear Physics

Nuclear Experiment

8 pages, 3 figures. Invited talk at Hard Probes 2006, Asilomar, CA

Scientific paper

10.1016/j.nuclphysa.2006.11.041

Mid-rapidity azimuthal correlations probe di-jets originating mainly from gluon-gluon hard-scattering. Measurements of such correlations have revealed significant (gluon-)jet modification in central Au+Au collisions. Azimuthal correlations at forward rapidity with a mid-rapidity high-pt hadron, on the other hand, are sensitive primarily to quark-gluon hard-scattering and may probe quark-jet modification in nuclear medium. They may be also sensitive to the Color Glass Condensate by separating d-side and Au-side in d+Au collisions. We present the first results on correlations of charged hadrons at forward rapidity in the STAR FTPCs (2.7 < |eta| < 3.9, pt < 2 GeV/c) with high-pt charged hadrons at mid-rapidity from the main TPC (|eta| < 1, pt > 3 GeV/c). Preliminary results from pp, d+Au, and Au+Au collisions at 200 GeV are compared. Implications of the results are discussed.

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