Angular hadron correlations probing the early medium evolution

Details Angular hadron correlations probing the early medium evolution Angular hadron correlations probing the early medium evolution

2007-01-12

arxiv.org/abs/hep-ph/0701097v1

J.Phys.G34:S663-666,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at the 19th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions: Quark Matter 2006 (QM 2006),

Scientific paper

10.1088/0954-3899/34/8/S68

Hard processes are a well calibrated probe to study heavy-ion collisions. However, the information to be gained from the nuclear suppression factor R_AA is limited, hene one has to study more differential observables to do medium tomography. The angular correlations of hadrons associated with a hard trigger appear suitable as they show a rich pattern when going from low p_T to high p_T. Of prime interest is the fate of away side partons with an in-medium pathlength O(several fm). At high p_T the correlations become dominated by the punchtrough of the away side parton with subsequent fragmentation. We discuss what information about the medium density can be gained from the data.

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