Event-By-Event Initial Conditions for Heavy Ion Collisions

TL;DR

This paper develops an event-by-event method to calculate the initial energy-momentum tensor in heavy ion collisions using classical gluon fields from the Color Glass Condensate framework, enabling more detailed hydrodynamic modeling.

Contribution

It introduces a novel event-by-event calculation of the energy-momentum tensor in heavy ion collisions based on classical gluon fields within the CGC framework.

Findings

Provides a way to incorporate initial state fluctuations into hydrodynamic simulations.

Enables more accurate modeling of the early-time dynamics in heavy ion collisions.

Lays groundwork for improved understanding of quark-gluon plasma formation.

Abstract

The early time dynamics of heavy ion collisions can be described by classical fields in an approximation of Quantum ChromoDynamics (QCD) called Color Glass Condensate (CGC). Monte-Carlo sampling of the color charge for the incoming nuclei are used to calculate their classical gluon fields. Following the recent work by Chen et al. we calculate the energy momentum tensor of those fields at early times in the collision event-by-event. This can then be used for subsequent hydrodynamic evolution of the single events.