Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-10-12
Phys.Rev. C71 (2005) 014903
Physics
Nuclear Physics
Nuclear Theory
RevTex 4, 7 pages, 3 figures
Scientific paper
10.1103/PhysRevC.71.014903
One of the non-Abelian features of parton energy loss is the ratio $\Delta E_g/\Delta E_q=9/4$ between gluon and quark jets. Since jet production rate is dominated by quark jets at high $x_T=2p_T/\sqrt{s}$ and by gluon jets at low $x_T$, high $p_T$ 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 $p_T\sim 5-20$ 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.
Wang Qiangguo
Wang Xin-Nian
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