6533b870fe1ef96bd12d0515
RESEARCH PRODUCT
Systematics of parton-medium interaction from RHIC to LHC
Thorsten RenkThorsten RenkHannu HolopainenHannu HolopainenKari J. EskolaKari J. EskolaUlrich HeinzJussi AuvinenJussi AuvinenChun ShenRisto PaatelainenRisto Paatelainensubject
PhysicsNuclear and High Energy PhysicsEnergy lossLarge Hadron Collider010308 nuclear & particles physicsHigh Energy Physics::PhenomenologyFOS: Physical sciencesZero-point energyParton01 natural sciencesSpectral lineModel dynamicsNuclear physicsStrange matterHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesHigh Energy Physics::Experiment010306 general physicsAbsorption (electromagnetic radiation)Nuclear Experimentdescription
Despite a wealth of experimental data for high-P_T processes in heavy-ion collisions, discriminating between different models of hard parton-medium interactions has been difficult. A key reason is that the pQCD parton spectrum at RHIC is falling so steeply that distinguishing even a moderate shift in parton energy from complete parton absorption is essentially impossible. In essence, energy loss models are effectively only probed in the vicinity of zero energy loss and, as a result, at RHIC energies only the pathlength dependence of energy loss offers some discriminating power. At LHC however, this is no longer the case: Due to the much flatter shape of the parton p_T spectra originating from 2.76 AGeV collisions, the available data probe much deeper into the model dynamics. A simultaneous fit of the nuclear suppression at both RHIC and LHC energies thus has great potential for discriminating between various models that yield equally good descriptions of RHIC data alone.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-06-13 |