The non-Abelian feature of parton energy loss in energy dependence of jet quenching in high-energy heavy-ion collisions
Qun Wang, Xin-nian Wang
Abstract
One of the non-Abelian features of parton energy loss is the ratio ΔEg/ΔEq=9/4 between gluon and quark jets. Since jet production rate is dominated by quark jets at high xT=2pT/s and by gluon jets at low xT, high pT hadron suppression in high-energy heavy-ion collisions should reflect such a non-Abelian feature. Within a leading order perturbative QCD parton model that incorporates transverse expansion and Woods-Saxon nuclear distribution, the energy dependence of large pT 5-20 GeV/c hadron suppression is found to be sensitive to the non-Abelian feasture of parton energy loss and could be tested by data from low energy runs at RHIC or data from LHC.
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