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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…

High Energy Physics - Phenomenology · Physics 2009-03-12 Hirotsugu Fujii , Kenji Fukushima , Yoshimasa Hidaka

The IP-Glasma initial condition has been highly successful in the phenomenology of ultra-relativistic heavy ion collisions. The assumption of boost invariance, however, while good for collision energies probed at the LHC, limits the use of…

High Energy Physics - Phenomenology · Physics 2023-06-09 Scott McDonald , Sangyong Jeon , Charles Gale

We explore the effects of including the energy dependence determined from evolution equations within the color glass condensate framework on observables in ultra-relativistic heavy-ion collisions. This amounts to integrating the JIMWLK…

Nuclear Theory · Physics 2025-02-10 Heikki Mäntysaari , Björn Schenke , Chun Shen , Wenbin Zhao

In this brief note, we determine the fluctuations of the initial eccentricity in heavy-ion collisions caused by fluctuations of the nucleon configurations. This is done via a Monte-Carlo implementation of a Color Glass Condensate…

Nuclear Theory · Physics 2008-11-26 H. -J. Drescher , Y. Nara

Recent theory progresses in (3+1)D dynamical descriptions of relativistic nuclear collisions at finite baryon density are reviewed. Heavy-ion collisions at different collision energies produce strongly coupled nuclear matter to probe the…

Nuclear Theory · Physics 2022-02-16 Chun Shen

The initial energy density produced in an ultrarelativistic heavy ion collision can, in the color glass condensate framework, be factorized into a product of the integrated gluon distributions of the nuclei. Although this energy density is…

High Energy Physics - Phenomenology · Physics 2008-11-26 T. Lappi

Potential near- and long-term physics opportunities with jets, heavy flavors and electromagnetic probes at the Relativistic Heavy Ion Collider (RHIC) are presented. Much new physics remains to be unveiled using these probes, due to their…

Nuclear Experiment · Physics 2009-01-07 John W. Harris

We perform an analytic calculation of the color fields in heavy-ion collisions by considering the collision of longitudinally extended nuclei in the dilute limit of the Color Glass Condensate effective field theory of high-energy QCD. Based…

High Energy Physics - Phenomenology · Physics 2022-07-27 Andreas Ipp , David I. Müller , Soeren Schlichting , Pragya Singh

We examine the origins of azimuthal correlations observed in high energy proton-nucleus collisions by considering the simple example of the scattering of uncorrelated partons off color fields in a large nucleus. We demonstrate how the…

High Energy Physics - Phenomenology · Physics 2016-01-19 T. Lappi , B. Schenke , S. Schlichting , R. Venugopalan

A strongly interacting Quark-Gluon Plasma (sQGP) is created in the high energy heavy ion collisions at RHIC and LHC. Our present understanding of sQGP as a very good liquid with astonishingly low viscosity is reviewed. With the arrival of…

Nuclear Experiment · Physics 2023-02-17 Debasish Das

We provide the first calculation of two-gluon production at mid-rapidity in ultra-peripheral collisions in the Color Glass Condensate framework. To estimate systematic uncertainty associated with poor understanding of the wave function of…

High Energy Physics - Phenomenology · Physics 2022-12-28 Haowu Duan , Alexander Kovner , Vladimir V. Skokov

A new set of equations for relativistic viscous hydrodynamics that captures both weak-coupling and strong-coupling physics to second order in gradients has been developed recently. We apply this framework to bulk physics at RHIC, both for…

Nuclear Theory · Physics 2014-11-18 Matthew Luzum , Paul Romatschke

Recent estimates that Color Glass Condensate initial conditions may generate a larger initial eccentricity for noncentral relativistic heavy ion collisions (relative to the initial eccentricity assumed in earlier hydrodynamic calculations)…

Nuclear Theory · Physics 2008-11-26 T. Lappi , R. Venugopalan

The purpose of these lectures is to provide an introduction to the physics issues which are being studied in the RHIC heavy ion program. These center around the production of new states of matter. The Quark Gluon Plasma is thermal matter…

High Energy Physics - Phenomenology · Physics 2007-05-23 Larry McLerran

In this study we model early times dynamics of the system produced in relativistic heavy ion collisions by an initial color electric field which then decays to a plasma by the Schwinger mechanism, coupling the dynamical evolution of the…

High Energy Physics - Phenomenology · Physics 2016-04-20 M. Ruggieri , A. Puglisi , L. Oliva , S. Plumari , F. Scardina , V. Greco

We give an elementary discussion of parton saturation and its description by the effective theory of the Color Glass Condensate. We report on progress in calculating multi-gluon correlators. The latter are necessary for many…

High Energy Physics - Phenomenology · Physics 2012-09-17 D. N. Triantafyllopoulos

The Glasma is a gluonic state of matter which can be created in collisions of relativistic heavy ions and is a precursor to the quark-gluon plasma. The existence of this state is a prediction of the color glass condensate (CGC) effective…

High Energy Physics - Phenomenology · Physics 2020-09-14 David Müller

We present a succinct formulation of the energy-momentum tensor of the Glasma characterizing the initial color fields in relativistic heavy-ion collisions in the Color Glass Condensate effective theory. We derive concise expressions for the…

High Energy Physics - Phenomenology · Physics 2024-05-28 Andreas Ipp , Markus Leuthner , David I. Müller , Sören Schlichting , Kayran Schmidt , Pragya Singh

We review the phenomenology and theory of bulk observables in ultra-relativistic heavy-ion collisions, focussing on recent developments involving event-by-event fluctuations in the initial stages of a heavy ion collision, and how they…

Nuclear Theory · Physics 2014-06-03 Matthew Luzum , Hannah Petersen

Proton-nucleus collisions (p+A) at LHC energies provide a rigorous test of the Color Glass Condensate (CGC), a model proposed to describe the high energy limit of Quantum Chromodynamics. In the CGC the average multiplicity of charged…

High Energy Physics - Phenomenology · Physics 2013-11-04 Adam Bzdak , Vladimir Skokov