Extracting the jet transport coefficient from jet quenching in high-energy heavy-ion collisions

By K. Burke, Alessandro Buzzatti, N. Chang, Charles Gale, M. Gyulassy, Ulrich Heinz, Sangyong Jeon, A. Majumder, Berndt Muller, G. Qin and 6 more. 2013

326 citations recorded by the source corpus.

Within five different approaches to parton propagation and energy loss in dense matter, a phenomenological study of experimental data on suppression of large $p_T$ single inclusive hadrons in heavy-ion collisions at both RHIC and LHC was carried out. The evolution of bulk medium used in the study for parton propagation was given by 2+1D or 3+1D hydrodynamic models which are also constrained by experimental data on bulk hadron spectra. Values for the jet transport parameter $\hat q$ at the center of the most central heavy-ion collisions are extracted or calculated within each model, with parameters for the medium properties that are constrained by experimental data on the hadron suppression factor $R_{AA}$. For a quark with initial energy of 10 GeV we find that $\hat q\approx 1.2 \pm 0.3$ GeV$^2$/fm at an initial time $\tau_0=0.6$ fm/$c$ in Au+Au collisions at $\sqrt{s}=200$ GeV/n and $\hat q\approx 1.9 \pm 0.7 $ GeV$^2$/fm in Pb+Pb collisions at $\sqrt{s}=2.76 $ TeV/n. Compared to earlier studies, these represent significant convergence on values of the extracted jet transport parameter, reflecting recent advances in theory and the availability of new experiment data from the LHC.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/a0ff6a4176a3878fc31a36e4ccfb1cd73bd57b9a

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In Nuclear and High Energy Physics

Citations in the corpus

Transverse momentum spectra and nuclear modification factors of charged particles in pp, p-Pb and Pb-Pb collisions at the LHC (2018, background): “Manifested also as a suppression of high-pT particles, jet quenching enables the extraction of the properties of the deconfined medium, in particular its transport coefficient q̂ [2].”
Jet quenching in high-energy heavy-ion collisions (2015, methodology): “In order to fully take into account the systematic uncertainties due to model dependence, more jet quenching calculations (see e.g., Ref.94,95,108–111) should be included in the future for such systematic phenomenological studies as done by the JET Collaboration.”
Extraction of heavy-flavor transport coefficients in QCD matter (2018, background): “In a dynamical QCD medium, the perturbative interactions between a high-energy parton and the QGP can be characterized by the HTL resummed elastic collision rate [143]”
A hybrid strong/weak coupling approach to jet quenching (2014, background): “[52], when the large logarithms are evaluated as prescribed in those works.”