Flavor hierarchy of parton energy loss in quark-gluon plasma from a Bayesian analysis

Abstract

The quenching of light and heavy flavor hadrons in relativistic heavy-ion collisions probes the color and flavor dependences of parton energy loss through a color-deconfined quark-gluon plasma (QGP), and thus reveals the properties of QCD matter at extremely high density and temperature. By combining a next-to-leading order perturbative QCD calculation of parton production, a general ansatz of parton energy loss functions and parton fragmentation functions, we calculate the nuclear modification of various hadron species -- charged hadrons, $D$ mesons and $B$-decayed $J/\psi$ -- over a wide transverse momentum regime. Comparing our calculations to the experimental data using the Bayesian statistical analysis, we perform a first simultaneous extraction of the energy loss functions of gluons ($g$), light quarks ($q$), charm quarks ($c$) and bottom quarks ($b$) inside the QGP. We find that the average parton energy loss at high energies follows the expected hierarchy of $⟨\Delta E_g⟩>⟨\Delta E_q⟩\sim ⟨\Delta E_c⟩>⟨\Delta E_b⟩$, while the parton energy loss distribution can further test the QCD calculations of parton interaction with the dense nuclear matter. We also find that the reduction of experimental uncertainties can significantly improve the precision of the extracted parton energy loss functions inside the QGP.

7 pages, 5 figures

References in corpus (17)

• The theory and phenomenology of perturbative QCD based jet quenching
• Studies of jet quenching using isolated-photon + jet correlations in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV
• Phenomenological constraints on the transport properties of QCD matter with data-driven model averaging
• Charmed-Meson Fragmentation Functions with Finite-Mass Corrections
• Systematic Comparison of Jet Energy-Loss Schemes in a realistic hydrodynamic medium
• Constraining the Eq. of State of Super-Hadronic Matter from Heavy-Ion Collisions
• Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV with the ATLAS detector
• Collisional Energy Loss in a Finite Size QCD Matter
• Determining the jet transport coefficient $\hat{q}$ from inclusive hadron suppression measurements using Bayesian parameter estimation
• Quantifying properties of hot and dense QCD matter through systematic model-to-data comparison
• Bayesian inference of the fluctuating proton shape
• Elastic energy loss and longitudinal straggling of a hard jet
• Medium Response and Jet-Hadron Correlations in Relativistic Heavy-Ion Collisions
• Enhancement of baryon-to-meson ratios around jets as a signature of medium response
• Final State Gluon Emission in Deep-Inelastic Scattering at Next-to-Leading Twist
• Unraveling Gluon Jet Quenching through $J/\psi$ Production in Heavy-Ion Collisions
• Quenching jets increases their flavor

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• Constraining color-charge effects of partonic energy loss with jet axis-based inclusive jet substructure measurement