1,796 research outputs found
Real-Time Evolution of Soft Gluon Field Dynamics in Ultra-Relativistic Heavy-Ion Collisions
The dynamics of gluons and quarks in a relativistic nuclear collision are
described, within the framework of a classical mean-field transport theory, by
the coupled equations for the Yang-Mills field and a collection of colored
point particles. The particles are used to represent color source effects of
the valence quarks in the colliding nuclei. The possibilities of this approach
are studied to describe the real time evolution of small modes in the
classical effective theory in a non-perturbative coherent manner. The time
evolution of the color fields is explored in a numerical simulation of the
collision of two Lorentz-boosted clouds of color charged particles on a long
three-dimensional gauge lattice. We report results on soft gluon scattering and
coherent gluon radiation obtained in SU(2) gauge symmetry.Comment: 16 pages and 17 postscript figure
The CGC and the Glasma: Two Lectures at the Yukawa Insitute
These lectures concern the theory of the Color Glass Condensate (CGC) and the
Glasma. These are forms of matter that control the earliest times in hadronic
collisions. I will motivate the CGC and Glasma from simple physical
considerations, and provide a sketchy derivation from QCD. There will be some
discussion of experimental tests of these ideas
Initial Conditions for Parton Cascades
I discuss the initial conditions for a parton cascade.Comment: 8 pages, 2 figures, LATE
A Phenomenological Model of the Glasma and Photon Production
I discuss a phenomenological model for the Glasma. I introduce over occupied
distributions for gluons, and compute their time evolution. I use this model to
estimate the ratio of quarks to gluons and the entropy production as functions
of time. I then discuss photon production at RHIC and LHC, and how geometric
scaling and the Glasma might explain generic features of such production
From AGS-SPS and Onwards to the LHC
I review the history of the efforts using heavy ion collisions to make new
forms of matter. I discuss both the development of the theoretical ideas about
such new forms of matter, as well the past, present and planned experimental
efforts. I also highlight the development of this activity in both India and
China.Comment: Plenary talk for Quark Matter 2008 in Jaipur, Indi
Strongly Interacting Matter Matter at Very High Energy Density: 3 Lectures in Zakopane
These lectures concern the properties of strongly interacting matter at very
high energy density. I begin with the Color Glass Condensate and the Glasma,
matter that controls the earliest times in hadronic collisions. I then describe
the Quark Gluon Plasma, matter produced from the thermalized remnants of the
Glasma. Finally, I describe high density baryonic matter, in particular
Quarkyonic matter. The discussion will be intuitive and based on simple
structural aspects of QCD. There will be some discussion of experimental tests
of these ideas.Comment: Presented at the 50'th Crakow School of Theoretical Physics,
Zakopane, Poland, June 201
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