27 September 2015 to 3 October 2015
Kobe, Fashion Mart, Japan
Japan timezone

Early Time Dynamics of Gluon Fields in High Energy Nuclear Collisions

28 Sept 2015, 18:00
20m
Convention room 1

Convention room 1

Contributed talk Initial State Physics and Approach to Equilibrium Initial State Physics and Approach to Equilibrium II

Speaker

Prof. Joseph Kapusta (University of Minnesota)

Description

Nuclei colliding at very high energy create a strong, quasi-classical gluon field during the initial phase of their interaction. We present an analytic calculation of the initial space-time evolution of this field in the limit of very high energies using a formal recursive solution of the Yang-Mills equations. We provide analytic expressions for the initial chromo-electric and chromo-magnetic fields and for their energy-momentum tensor. In particular, we discuss event-averaged results for energy density and energy flow as well as for longitudinal and transverse pressure of this system. Our results are generally applicable if $\tau < 1/Q_s$. The transverse energy flow of the gluon field exhibits hydrodynamic-like contributions that follow transverse gradients of the energy density. In addition, a rapidity-odd energy flow also emerges from the non-abelian analog of Gauss' Law and generates non-vanishing angular momentum of the field. We will discuss the space-time picture that emerges from our analysis and its implications for observables in heavy ion collisions.
On behalf of collaboration: NONE

Primary author

Prof. Joseph Kapusta (University of Minnesota)

Co-authors

Dr Guangyao Chen (Iowa State University) Rainer Fries (Texas A&M University) Prof. Yang Li (University of Minnesota-Duluth)

Presentation materials