Probe initial parton density and formation time via jet quenching
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.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of High Energy and Nuclear Physics. Division of Nuclear Physics (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 809306
- Report Number(s):
- LBNL-52063; R&D Project: NTCOST; B& R KB0301020; TRN: US0302444
- Resource Relation:
- Conference: 16th International Conference on Ultrarelativistic Nucleus-nucleus collisions, Nantes (FR), 07/18/2002--07/24/2002; Other Information: PBD: 20 Sep 2002
- Country of Publication:
- United States
- Language:
- English
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