Initial energy density and gluon distribution from the Glasma in heavy-ion collisions

Abstract

We estimate the energy density and the gluon distribution associated with the classical fields describing the early-time dynamics of the heavy-ion collisions. We first decompose the energy density into the momentum components exactly in the McLerran-Venugopalan model, with the use of the Wilson line correlators. Then we evolve the energy density with the free-field equation, which is justified by the dominance of the ultraviolet modes near the collision point. We also discuss the improvement with inclusion of nonlinear terms into the time evolution. Our numerical results at RHIC energy are fairly consistent with the empirical values.

14 pages, 8 figures, 3 tables

References in corpus (7)

• Wilson line correlator in the MV model: relating the glasma to deep inelastic scattering
• Initial Singularity of the Little Bang
• Universality of the saturation scale and the initial eccentricity in heavy ion collisions
• Expanding color flux tubes and instabilities
• Randomness in infinitesimal extent in the McLerran-Venugopalan model
• Thermalization of Color Gauge Fields in High Energy Heavy Ion Collisions
• The glasma initial state at the LHC