Gluon spectrum in the glasma from JIMWLK evolution

Abstract

The JIMWLK equation with a "daughter dipole" running coupling is solved numerically starting from an initial condition given by the McLerran-Venugopalan model. The resulting Wilson line configurations are then used to compute the spectrum of gluons comprising the glasma inital state of a high energy heavy ion collision. The development of a geometrical scaling region makes the spectrum of produced gluons harder. Thus the ratio of the mean gluon transverse momentum to the saturation scale grows with energy. Also the total gluon multiplicity increases with energy slightly faster than the saturation scale squared.

7 pages, 8 figures, RevTeX. V2: typo corrections, corrected fig 1. Published in PLB

References in corpus (14)

• Some Features of the Glasma
• Quark contribution to the small-$x$ evolution of color dipole
• Triumvirate of Running Couplings in Small-x Evolution
• The ridge in proton-proton collisions at the LHC
• Non-linear QCD meets data: A global analysis of lepton-proton scattering with running coupling BK evolution
• Solving The High Energy Evolution Equation Including Running Coupling Corrections
• Single Inclusive Hadron Production at RHIC and the LHC from the Color Glass Condensate
• Wilson line correlator in the MV model: relating the glasma to deep inelastic scattering
• Particle multiplicities in Lead-Lead collisions at the LHC from non-linear evolution with running coupling
• Limiting fragmentation in hadron-hadron collisions at high energies
• Small x physics and RHIC data
• Energy dependence of the saturation scale and the charged multiplicity in pp and AA collisions
• The classical field created in early stages of high energy nucleus-nucleus collisions
• Gluon saturation and inclusive production at low transverse momenta

Cited by in corpus (65)

• Isotropization and hydrodynamization in weakly coupled heavy-ion collisions
• Novel Collective Phenomena in High-Energy Proton-Proton and Proton-Nucleus Collisions
• Universal attractor in a highly occupied non-Abelian plasma
• QCD thermalization: Ab initio approaches and interdisciplinary connections
• Single inclusive particle production at high energy from HERA data to proton-nucleus collisions
• Impact-parameter dependent Color Glass Condensate dipole model and new combined HERA data
• Matching the Nonequilibrium Initial Stage of Heavy Ion Collisions to Hydrodynamics with QCD Kinetic Theory
• Effective kinetic description of event-by-event pre-equilibrium dynamics in high-energy heavy-ion collisions
• Color Glass Condensate and Glasma
• Renormalization group evolution of multi-gluon correlators in high energy QCD
• Next-to-leading order Balitsky-Kovchegov equation with resummation
• Forward dihadron correlations in deuteron-gold collisions with a Gaussian approximation of JIMWLK
• Approach to equilibrium in weakly coupled nonabelian plasmas
• Forward $J/\psi$ production in proton-nucleus collisions at high energy
• Transverse-momentum-dependent gluon distributions from JIMWLK evolution
• Initial conditions for hydrodynamics from weakly coupled pre-equilibrium evolution
• Flow in AA and pA as an interplay of fluid-like and non-fluid like excitations
• Chemical Equilibration in Hadronic Collisions
• Chemical Equilibration in Weakly Coupled QCD
• The shape of the proton at high energies
• High Gluon Densities in Heavy Ions Collisions
• On the running coupling in the JIMWLK equation
• Role of quantum fluctuations in a system with strong fields: Spectral properties and Thermalization
• Thermalization, Isotropization and Elliptic Flow from Nonequilibrium Initial Conditions with a Saturation Scale
• Non-equilibrium attractor in high-temperature QCD plasmas
• Higher-point correlations from the JIMWLK evolution
• JIMWLK evolution in the Gaussian approximation
• Anisotropic momentum broadening in the 2+1D Glasma: analytic weak field approximation and lattice simulations
• Nonequilibrium fixed points in longitudinally expanding scalar theories: infrared cascade, Bose condensation and a challenge for kinetic theory
• HERA-data in the light of small x evolution with state of the art NLO input
• Broken boost invariance in the Glasma via finite nuclei thickness
• Gluon splitting in a shockwave
• Dynamical entropy of dense QCD states
• Color Glass Condensate and Glasma
• Semi-inclusive photon-hadron production in pp and pA collisions at RHIC and LHC
• TMD gluon distributions at small x in the CGC theory
• Initial state of Heavy-Ion Collisions: Isotropization and thermalization
• Jet momentum broadening during initial stages in heavy-ion collisions
• Hydrodynamic Attractors in Ultrarelativistic Nuclear Collisions
• Structure of longitudinal chromomagnetic fields in high energy collisions
• Rapidity dependence of initial state geometry and momentum correlations in p+Pb collisions
• Collinearly improved JIMWLK evolution in Langevin form
• Forward trijet production in proton-nucleus collisions
• JIMWLK evolution for multi-particle production in Langevin form
• Progress on 3+1D Glasma simulations
• Some Aspects of the Theory of Heavy Ion Collisions
• Testing the Gaussian Approximation to the JIMWLK Equation
• Implicit schemes for real-time lattice gauge theory
• Plasmon mass scale in classical nonequilibrium gauge theory
• Plasmon mass scale in two dimensional classical nonequilibrium gauge theory
• Structure of chromomagnetic fields in the glasma
• Initial State: Theory Status
• Proposal for a running coupling JIMWLK equation
• Forward Hadron Productions in high energy pp collisions from a Monte-Carlo generator for Color Glass Condensate
• Revisiting the Gluon Spectrum in the Boost-Invariant Glasma from a Semi-Analytic Approach
• Jet quenching in out-of-equilibrium QCD matter
• Collective flow in single-hit QCD kinetic theory
• Small systems and the single-hit approximation in the AMY parton cascade ALPACA
• Initial conditions in AA and pA collisions
• Fluctuations in ultra-relativistic heavy ion collisions
• The Color Glass Condensate and some applications
• Anomalous diffusion in QCD matter
• Diffractive vector meson production in ultraperipheral heavy ion collisions from the Color Glass Condensate
• Universality aspects of quantum corrections to transverse momentum broadening in QCD media
• High Energy Collisions of Dense Hadrons in Quantum Chromodynamics : LHC Phenomenology and Universality of Parton Distributions