Modified Fragmentation Function and Jet Quenching at RHIC

Details Modified Fragmentation Function and Jet Quenching at RHIC Modified Fragmentation Function and Jet Quenching at RHIC

2002-08-09

arxiv.org/abs/hep-ph/0208094v2

Nucl.Phys. A702 (2002) 238

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk at International Symposium on Statistical QCD, Bielefeld, Germany, 26-30 Aug 2001; 11 pages with 6 postscript fig

Scientific paper

10.1016/S0375-9474(02)00711-X

Medium modification of jet fragmentation functions and parton energy loss in cold and hot matter are reviewed. The predicted nuclear modification of the jet fragmentation function agrees well with the recent HERMES data with a resultant energy loss dE/dx approximately 0.5 GeV/fm. From the the recent PHENIX data of high p_T pi_0 spectra in central Au+Au collisions at sqrt(s)=130 GeV, one extracts an energy loss for a 10 GeV parton that is equivalent to dE/dx=7.3 GeV/fm in a static medium with the same gluon density as in the initial stage of the collision at tau_0=0.2 fm/c. Constraints on jet quenching by the central rapidity density of charged hadrons is also discussed.

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