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Probing the Short-Distance Structure of the Quark-Gluon Plasma with Energy Correlators
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Probing the Short-Distance Structure of the Quark-Gluon Plasma with Energy Correlators
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Energy-energy-correlators (EEC's) are a promising observable to study the dynamics of jet evolution in the quark-gluon plasma (QGP) through its imprint on angular scales in the energy flux of final-state particles. We carry out the first complete calculation of EEC's using realistic simulations of high-energy heavy-ion collisions, and dissect the different dynamics underlying the final distribution through analyses of jet propagation in a uniform medium. The EEC's of $\gamma$-jets in heavy-ion collisions are found to be enhanced by the medium response from elastic scatterings instead of induced gluon radiation at large angles. In the meantime, EEC's are suppressed at small angles due to energy loss and transverse momentum broadening of jet shower partons. These modifications are further shown to be sensitive to the angular scale of the in-medium interaction, as characterized by the Debye screening mass. Experimental verification and measurement of such modifications will shed light on this scale, and the short-distance structure of the QGP in heavy-ion collisions.
Forward citations
Cited by 12 Pith papers
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In-medium QCD splittings beyond the soft, large-$N_c$ and harmonic-oscillator approximations all at once
First complete numerical solution of BDMPS-Z equations for in-medium QCD splittings, going beyond soft, large-Nc and harmonic-oscillator approximations.
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Energy-energy correlators in p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV
First measurement of two-point EEC in 20-80 GeV/c charged jets in p-Pb collisions shows modification relative to pp at the same energy, with enhancement at large angles and suppression at small angles in the 20-40 GeV...
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A parton shower derived from QCD effective kinetic theory reproduces the full linearized Boltzmann equation and generates jet wakes, Mach-cone-like structures, and two-particle correlations.
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Benchmarking the Nearside Energy-Energy Correlators with Mellin Transform
A Mellin-transform framework with one fitted transition scale Λ describes nearside EECs in e+e− annihilation at NNLO+NNLL accuracy across ALEPH and earlier data.
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New CGC+SCET factorization framework for multiplicity-dependent single-inclusive forward jets in pA collisions that preserves the inclusive limit and identifies saturation effects on internal jet evolution.
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CGC plus SCET semi-inclusive jet functions yield a multiplicity-conditioned forward-jet factorization that reduces exactly to the known inclusive CGC jet cross section.
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Energy-energy correlators inside single inclusive jets in heavy-ion collisions with CoLBT-hydro model
A multi-stage CoLBT-hydro simulation with a 2 GeV medium scale reproduces the CMS in-jet EEC and predicts rank- and rapidity-gap-dependent modifications that encode path length and the diffusion wake.
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Hydrodynamics and Energy Correlators
Energy-energy correlators in heavy-ion collisions exhibit classical hydrodynamic scaling from collective flow at large angles within the small-angle regime, collective modes at smaller angles, and light-ray OPE at eve...
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An improved LBT model with an earlier medium-scale insertion and color-flow tracking reproduces hadron and jet nuclear modification factors together in 5.02 TeV Pb+Pb collisions.
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Exploring nuclear modification using one-point energy correlator at the electron-ion collider
OPEC in e+A collisions factorizes in TMD QCD and predicts ~0.3–0.4 nuclear suppression at small angles, growing with angle, as a probe of cold-nuclear-matter broadening.
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Energy-energy correlators inside single inclusive jets in heavy-ion collisions with CoLBT-hydro model
Updated CoLBT-hydro simulations with Q_M=2.0 GeV reproduce CMS in-jet EEC data, validate background subtraction, and show path-length and diffusion-wake effects.
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