Global constraint on the jet transport coefficient from single-hadron, dihadron, and <math><mi>γ</mi></math>-hadron spectra in high-energy heavy-ion collisions

-hadron spectra in relativistic heavy-ion collisions are direct consequences of parton-medium interactions in the quark-gluon plasma (QGP). The interaction strength and underlying dynamics can be quantified by the jet transport coefficient

\hat{q}

. We carry out the first global constraint on

\hat{q}

using a next-to-leading order pQCD parton model with higher-twist parton energy loss and combining world experimental data on single-hadron, dihadron, and

γ

-hadron suppression at both RHIC and LHC energies with a wide range of centralities. The global Bayesian analysis using the information field (IF) priors provides the most stringent constraint on

\hat{q} (T)

. We demonstrate in particular the progressive constraining power of the IF Bayesian analysis on the strong temperature dependence of

\hat{q}

using data from different centralities and colliding energies. We also discuss the advantage of using both inclusive and correlation observables with different geometric biases. As a verification, the obtained

\hat{q} (T)

is shown to describe data on single-hadron anisotropy at high transverse momentum well. Predictions for future jet quenching measurements in oxygen-oxygen collisions are also provided.

Note:

32 pages in ReVtex with 32 figures. Version submitted to PRC

heavy ion: scattering
parton: energy loss
jet: quenching
quantum chromodynamics: perturbation theory
model: parton
higher-order: 1
quark gluon: plasma
transverse momentum: high
hadron: production
dihadron

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Figures(42)

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