Extracting jet transport coefficient via single hadron and dihadron productions in high-energy heavy-ion collisions

Abstract

We study the suppressions of high transverse momentum single hadron and dihadron productions in high-energy heavy-ion collisions based on the framework of a next-to-leading-order perturbative QCD parton model combined with the higher-twist energy loss formalism.Our model can provide a consistant description for the nuclear modification factors of single hadron and dihadron productions in central and non-central nucleus-nucleus collisions at RHIC and the LHC energies. We quantitatively extract the value of jet quenching parameter $\hat{q}$ via a global ${\chi }^2$ analysis, and obtain $\hat{q}/T^3=4.1\sim 4.4$ at $T=378$~MeV at RHIC and $\hat{q}/T^3=2.6\sim 3.3$ at $T=486$~MeV at the LHC, which are consistent with the results from JET Collaboration. We also provide the predictions for the nuclear modification factors of dihadron productions in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV and in Xe+Xe collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.44 TeV.

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