Probe Initial Parton Density and Formation Time via Jet Quenching

Details Probe Initial Parton Density and Formation Time via Jet Quenching Probe Initial Parton Density and Formation Time via Jet Quenching

2003-01-22

arxiv.org/abs/hep-ph/0301196v1

Nucl.Phys. A715 (2003) 775-778

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures, talk at Quark Matter 2002, 16th International Conference on Ultrarelativistic Nucleus-nucleus Collisions,

Scientific paper

10.1016/S0375-9474(02)01486-0

Medium modification of jet fragmentation function due to multiple scattering and induced gluon radiation leads directly to jet quenching or suppression of leading particle distribution from jet fragmentation. One can extract an effective total parton energy loss which can be related to the total transverse momentum broadening. For an expanding medium, both are shown to be sensitive to the initial parton density and formation time. Therefore, one can extract the initial parton density and formation time from simultaneous measurements of parton energy loss and transverse momentum broadening. Implication of the recent experimental data on effects of detailed balance in parton energy loss is also discussed.

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