Impact of Glasma on heavy quark observables in nucleus-nucleus collisions at LHC

Abstract

In the pre-thermal equilibrium stage of relativistic heavy-ion collisions, a strong quasi-classical transverse gluon field emerges at about ${\tau }_0\simeq 0.1fm/c$ and evolves together with their longitudinal counterparts according to the classical Yang-Mills (CYM) equations. Recently it has been shown that these fields induce a diffusion of charm quarks in momentum space resulting in a tilt of their spectrum without a significant drag. We find that in nucleus-nucleus collisions at LHC such a novel dynamics of charm quarks leads to an initial enhancement of the nuclear modification factor ($R_{AA}$) at $p_T$ larger than 2 GeV$/c$ contrary to the standard lore. Moreover, the same dynamics leads to a larger final elliptic flow ($v_2$) inducing a relation between $R_{AA}$ and $v_2$ that is quite close to the experimental measurements. Our study also shows that such an initial pre-thermal stage is unlikely to be described in terms of a standard drag and diffusion dynamics, because even if one tune such coefficients to reproduce the same $R_{AA}(p_T)$ this would imply a significantly smaller $v_2$.

arXiv comment7 pages, 4 figures

References in corpus (46)

• Computing Quark and Gluon Distribution Functions for Very Large Nuclei
• Gluon Distribution Functions for Very Large Nuclei at Small Transverse Momentum
• Nonlinear Gluon Evolution in the Color Glass Condensate: I
• Green's Functions in the Color Field of a Large Nucleus
• How Much do Heavy Quarks Thermalize in a Heavy Ion Collision?
• Some Features of the Glasma
• Heavy-Quark Probes of the Quark-Gluon Plasma at RHIC
• Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma
• Linearized Boltzmann transport model for jet propagation in the quark-gluon plasma: Heavy quark evolution
• Towards an understanding of the RHIC single electron data
• Extraction of Heavy-Flavor Transport Coefficients in QCD Matter
• Heavy-Quark Diffusion and Hadronization in Quark-Gluon Plasma
• ${\mathbf{D}}_{\mathbf{s}}$-Meson as Quantitative Probe of Diffusion and Hadronization in Nuclear Collisions
• Directed Flow of Charm Quarks as a Witness of the Initial Strong Magnetic Field in Ultra-Relativistic Heavy Ion Collisions
• Heavy Quark Momentum Diffusion Coefficient from Lattice QCD
• Toward a solution to the $R_{AA}$ and $v_2$ puzzle for heavy quarks
• Heavy-flavour spectra in high energy nucleus-nucleus collisions
• Open Heavy Flavor in QCD Matter and in Nuclear Collisions
• Energy loss, hadronization and hadronic interactions of heavy flavors in relativistic heavy-ion collisions
• Nuclear enhancement of universal dynamics of high parton densities
• Recent thermodynamic results from lattice QCD analyzed within a quasi-particle model
• Wilson line correlator in the MV model: relating the glasma to deep inelastic scattering
• Charm production in Pb+Pb collisions at the Large Hadron Collider energy
• A data-driven analysis for the temperature and momentum dependence of the heavy quark diffusion coefficient in relativistic heavy-ion collisions
• Tomography of a quark gluon plasma at RHIC and LHC energies
• D-meson azimuthal anisotropy in mid-central Pb-Pb collisions at $\sqrt{{\mathbf{s}}_{\mathrm{NN}}}=5.02$ TeV
• Heavy flavours in AA collisions: production, transport and final spectra
• Dragging Heavy Quarks in Quark Gluon Plasma at the Large Hadron Collider
• Collisional processes of on-shell and off-shell heavy quarks in vacuum and in the Quark-Gluon-Plasma
• Large directed flow of open charm mesons probes the three dimensional distribution of matter in heavy ion collisions
• Thermalization of charm quarks in infinite and finite QGP matter
• Thermalization, Isotropization and Elliptic Flow from Nonequilibrium Initial Conditions with a Saturation Scale
• Chaotic behavior in classical Yang-Mills dynamics
• Cracking the difference of estimating heavy quark transport coefficients in a Quark-Gluon Plasma
• Dynamical collisional energy loss and transport properties of on- and off-shell heavy quarks in vacuum and in the Quark Gluon Plasma
• Initial state fluctuations from mid-peripheral to ultra-central collisions in a event-by-event transport approach
• Propagation of heavy baryons in heavy-ion collisions
• The cathode tube effect: heavy quarks probing the Glasma in p-Pb collisions
• Heavy Quarks in Turbulent QCD Plasmas
• Continuum estimate of the heavy quark momentum diffusion coefficient $\kappa$
• Toward a consistent evolution of the quark-gluon plasma and heavy quarks
• Heavy quark diffusion in pre-equilibrium stage of heavy ion collisions
• The Influence of Initial State Fluctuations on Heavy Quark Energy Loss in Relativistic Heavy-ion Collisions
• Evolution of pressures and correlations in the Glasma produced in high energy nuclear collisions
• Diffusion of charm and beauty in the Glasma
• Measurements of directed and elliptic flow for $D^0$ and $\overline{D^0}$ mesons using the STAR detector at RHIC

Cited by in corpus (35)

• Simulating jets and heavy quarks in the Glasma using the colored particle-in-cell method
• Jet momentum broadening in the pre-equilibrium Glasma
• Anisotropic momentum broadening in the 2+1D Glasma: analytic weak field approximation and lattice simulations
• Transport of hard probes through glasma
• Heavy Quarks Embedded in Glasma
• Heavy quark diffusion in an overoccupied gluon plasma
• Jet quenching in glasma
• Heavy-light flavour correlations of anisotropic flows at LHC energies within event-by-event transport approach
• Memory effects on energy loss and diffusion of heavy quarks in the quark-gluon plasma
• System size scan of D meson $R_{\text{AA}}$ and $v_n$ using PbPb, XeXe, ArAr, and OO collisions at LHC
• Dynamics of Hot QCD Matter -- Current Status and Developments
• Heavy quark diffusion coefficient in heavy-ion collisions via kinetic theory
• Heavy quark transport in an anisotropic hot QCD medium: Collisional and Radiative processes
• Ballistic diffusion of heavy quarks in the early stage of relativistic heavy ion collisions at RHIC and LHC
• Diffusion of heavy quarks in the early stage of high-energy nuclear collisions at energies available at the BNL Relativistic Heavy Ion Collider and at the CERN Large Hadron Collider
• Open charm phenomenology with a multi-stage approach to relativistic heavy-ion collisions
• Heavy quark transport coefficients in a viscous QCD medium with collisional and radiative processes
• Exploring the effects of electromagnetic fields and tilted bulk distribution on directed flow of D mesons in small systems
• Energy Loss Versus Energy Gain of Heavy Quarks in a Hot Medium
• Multi-charmed and singled charmed hadrons from coalescence: yields and ratios in different collision systems at LHC
• Heavy Quark Momentum Broadening in a Non-Abelian Plasma away from Thermal Equilibrium
• Jet quenching parameter in QCD kinetic theory
• Impact of off-shell dynamics on the transport properties and the dynamical evolution of Charm Quarks at RHIC and LHC temperatures
• Heavy flavor angular correlations as a direct probe of the glasma
• The impact of glasma on heavy flavor azimuthal correlations and spectra
• Persistent nonequilibrium effects in generalized Langevin dynamics of nonrelativistic and relativistic particles
• Towards the understanding of heavy quarks hadronization: from leptonic to heavy-ion collisions
• The signature of charge dependent directed flow observables by electromagnetic fields in heavy ion collisions
• Charm balance function in relativistic heavy-ion collisions
• Subdiffusion of heavy quark in hot QCD matter by the fractional Langevin equation
• On transverse momentum broadening in real-time lattice simulations of the glasma and in the weak-field limit
• Event shape Engineering analysis of D meson in ultrarelativistic heavy ion collisions
• Elliptic flow of charm quarks produced in the early stage of pA collisions
• Heavy quark diffusion coefficient during hydrodynamization -- non-equilibrium vs. equilibrium
• Heavy quark momentum diffusion coefficient during hydrodynamization via effective kinetic theory