A running coupling explanation of the surprising transparency of the QGP at LHC

Abstract

The CUJET Monte Carlo Jet Energy loss model is applied to predict the jet flavor, centrality and density dependence of the nuclear modification factor $R_{AA}$ at RHIC and LHC. Running coupling effects due to combined $x$, $k_{\perp }$ and $q_{\perp }$ evolution are included for the first time in the dynamical DGLV opacity expansion framework and are shown to provide a natural dynamical QCD tomographic solution to the surprising transparency of the quark gluon plasma produced at LHC as suggested by $p_{\perp }>10$ GeV $R_{AA}$ data from ALICE, ATLAS, and CMS.

4 pages, 4 figures. Proceedings for Quark Matter 2012

References in corpus (4)

• Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Radiative energy loss in a finite dynamical QCD medium
• Jet quenching with running coupling including radiative and collisional energy losses
• Quantum Interference Effects Among Helicities at LEP-II and Tevatron

Cited by in corpus (15)

• Extracting jet transport coefficient from jet quenching at RHIC and LHC
• Open Heavy Flavor in QCD Matter and in Nuclear Collisions
• Bridging Soft-Hard Transport Properties of Quark-Gluon Plasmas with CUJET3.0
• LHC jet suppression of light and heavy flavor observables
• Consistency of Perfect Fluidity and Jet Quenching in semi-Quark-Gluon Monopole Plasmas
• Azimuthal jet flavor tomography with CUJET2.0 of nuclear collisions at RHIC and LHC
• Enhancement of jet quenching around phase transition: result from the dynamical holographic model
• Constraints on the Path-Length Dependence of Jet Quenching in Nuclear Collisions at RHIC and LHC
• Centrality dependence of high-$p_{\mathrm{T}}$ D meson suppression in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Hard Probe of Geometry and Fluctuations in Heavy Ion Collisions at $\sqrt{s_{{}_{NN}}}=$ 0.2, 2.76, and 5.5 TeV
• Investigation of Hot QCD Matter: Theoretical Aspects
• Inconsistencies in, and short pathlength correction to, $R_{AA}(p_T)$ in $\mathrm{A}+\mathrm{A}$ and $\mathrm{p}+\mathrm{A}$ collisions
• The tricky azimuthal dependence of jet quenching at RHIC and LHC via CUJET2.0
• Contrasting Features of Parton Energy Loss in Heavy-ion Collisions at RHIC and the LHC
• On the use of running ${\alpha }_s$ in calculations of radiative energy loss of fast partons in a quark-gluon plasma