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

Abstract

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 consistent 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 $$\hat{q}$$ q^ via a global $$\chi ^2$$ χ2 analysis, and obtain $${\hat{q}}/{T^3} = 4.1$$ q^/T3=4.1 –4.4 at $$T = 378$$ T=378 MeV at RHIC and $${\hat{q}}/{T^3} = 2.6$$ q^/T3=2.6 –3.3 at $$T = 486$$ 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 $$\sqrt{s_\mathrm{{NN}}}$$ sNN = 5.02 TeV and in Xe + Xe collisions at $$\sqrt{s_\mathrm{{NN}}}$$ sNN = 5.44 TeV.