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

2019/01/14 by Man Xie, Shu-Yi Wei, Guang-You Qin +1 · 1 citation
Physics and Astronomy · #hep-ph #nucl-th

paper · pdf · doi:10.1140/epjc/s10052-019-7100-1

arxiv created 2019/01/14 · arxiv updated 2019/09/04

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 q via a global χ² analysis, and obtain q/T³ = 4.1 ∼ 4.4 at T = 378~MeV at RHIC and q/T³ = 2.6 ∼ 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 √s_\rmNN = 5.02 TeV and in Xe+Xe collisions at √s_\rmNN = 5.44 TeV.

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