The classical field created in early stages of high energy nucleus-nucleus collisions
arXiv:0806.1422 · doi:10.1016/j.nuclphysa.2008.11.010
Abstract
We show that a special choice of light-cone gauge can greatly simplify the calculation of the classical color field created in the initial stages of nucleus-nucleus collisions. Within this gauge, we can in particular construct explicitly the conserved color current and calculate exactly the gauge field immediately after the collision. This field is used as a boundary condition in an iterative solution of the Yang-Mills equations in the forward light-cone. In leading order, which corresponds to a linearization of the Yang-Mills equation in the forward light-cone, we obtain a simple formula for the spectrum of gluons produced in nucleus-nucleus collisions. This formula reproduces exactly the known formula for proton-nucleus collisions, where factorization is recovered, while the latter property apparently breaks down in the case of nucleus-nucleus collisions.
26 pages, 3 figures
References in corpus (4)
Cited by in corpus (11)
- High Gluon Densities in Heavy Ions Collisions
- Small x physics and RHIC data
- Three-particle correlation from glasma flux tubes
- Classical Gluon Production Amplitude for Nucleus-Nucleus Collisions: First Saturation Correction in the Projectile
- Two-Gluon Production and Longitudinal Correlations in the Color Glass Condensate
- Memory effect in Yang-Mills theory
- Color-neutral heavy particle production in nucleus-nucleus collisions in the quasi-classical approximation
- Structure of chromomagnetic fields in the glasma
- First Saturation Correction in High Energy Proton-Nucleus Collisions: II. Single Inclusive Semi-Hard Gluon Production
- Classical initial conditions in high energy nucleus-nucleus collisions
- The glasma initial state and JIMWLK factorization