scholarly journals High energy pA collisions in the color glass condensate approach I: gluon production and the Cronin effect

2004 ◽  
Vol 743 (1-3) ◽  
pp. 13-56 ◽  
Author(s):  
Jean-Paul Blaizot ◽  
François Gelis ◽  
Raju Venugopalan
Keyword(s):  
High Energy ◽  
Color Glass ◽  
Color Glass Condensate ◽  
Cronin Effect ◽  
Gluon Production

scholarly journals Spinor helicity methods in high-energy factorization: Efficient momentum-space calculations in the Color Glass Condensate formalism

2017 ◽  
Vol 920 ◽  
pp. 232-255 ◽  
Author(s):  
Alejandro Ayala ◽  
Martin Hentschinski ◽  
Jamal Jalilian-Marian ◽  
Maria Elena Tejeda-Yeomans
Keyword(s):  
Momentum Space ◽  
High Energy ◽  
Color Glass ◽  
Color Glass Condensate

scholarly journals COLOR GLASS CONDENSATE IN BRANE MODELS OR DON'T ULTRA HIGH ENERGY COSMIC RAYS PROBE 1015eV SCALE?

2005 ◽  
Vol 20 (06) ◽  
pp. 419-440 ◽  
Author(s):  
HOURI ZIAEEPOUR
Keyword(s):  
Cosmic Rays ◽  
Extra Dimension ◽  
Cosmic Ray ◽  
High Energy ◽  
Effective Density ◽  
Color Glass ◽  
Color Glass Condensate ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Brane Models

In a previous work1 we have studied the propagation of relativistic particles in the bulk for some of the most popular brane models. Constraints have been put on the parameter space of these models by calculating the time delay due to propagation in the bulk of particles created during the interaction of Ultra High Energy Cosmic Rays (UHECRs) with protons in the terrestrial atmosphere. The question was, however, raised that probability of hard processes in which bulk modes can be produced is small and consequently, the tiny flux of UHECRs cannot constrain brane models. Here we use Color Glass Condensate (CGC) model to show that effects of extra dimensions are visible not only in hard processes when the incoming photon/parton hits a massive Kaluza–Klein mode but also through the modification of soft/semi-hard parton distribution. At classical level, for an observer in the CM frame of UHECR and atmospheric hadrons, color charge sources are contracted to a thin sheet with a width inversely proportional to the energy of the ultra energetic cosmic ray hadron and consequently they can see an extra dimension with comparable size. Due to QCD interaction, a short life swarm of partons is produced in front of the sheet and its partons can penetrate to the extra-dimension bulk. This reduces the effective density of partons on the brane or in a classical view creates a delay in the arrival of the most energetic particles if they are reflected back due to the warping of the bulk. In CGC approximation the density of swarm at different distances from the classical sheet can be related and therefore it is possible (at least formally) to determine the relative fraction of partons in the bulk and on the brane at different scales. Results of this work are also relevant to the test of brane models in hadron colliders like LHC.

scholarly journals Initial state and thermalization in the Color Glass Condensate framework

2015 ◽  
Vol 24 (10) ◽  
pp. 1530008 ◽  
Author(s):  
François Gelis
Keyword(s):  
Wave Function ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Color Glass ◽  
Color Glass Condensate ◽  
Nuclear Wave Function ◽  
Initial State ◽  
Early Stages ◽  
Ion Collisions

In this review, I present the description of the early stages of heavy ion collisions at high energy in the Color Glass Condensate framework, from the pre-collision high energy nuclear wave function to the point where hydrodynamics may start becoming applicable.

scholarly journals The Color Glass Condensate: An Intuitive Description

2006 ◽  
Vol 21 (04) ◽  
pp. 694-698 ◽  
Author(s):  
Larry McLerran
Keyword(s):  
High Energy ◽  
Color Glass ◽  
Color Glass Condensate ◽  
Interacting Particles ◽  
Universal Form ◽  
Strongly Interacting ◽  
Very High Energy ◽  
Very High

I argue that the physics of the scattering of very high energy strongly interacting particles is controlled by a new, universal form of matter, the Color Glass Condensate. I motivate the existence of this matter and describe some of its properties.

scholarly journals STRONG FIELDS: FROM HIGH Z ATOMS TO THE COLOR GLASS CONDENSATE

2007 ◽  
Vol 16 (03) ◽  
pp. 805-812 ◽  
Author(s):  
L. MCLERRAN
Keyword(s):  
Field Theory ◽  
Strong Field ◽  
Coulomb Field ◽  
High Energy ◽  
High Energy Density ◽  
Color Glass ◽  
Color Glass Condensate ◽  
Energy Limit ◽  
High Energy Limit ◽  
Thermally Activated

I review various strong field problems in field theory. I start with one of the earliest examples, a high Z Coulomb field. I discuss tunneling and thermally activated transitions in field theory. The latter problem may have applications to electroweak baryogenesis. Finally, I discuss the Color Glass Condensate, a form of high energy density gluonic matter which controls the high energy limit of QCD, and the Glasma which it makes in the collision of high energy nuclei.

scholarly journals HIGH ENERGY SCATTERING IN QUANTUM CHROMODYNAMICS

2007 ◽  
Vol 16 (09) ◽  
pp. 2595-2637 ◽  
Author(s):  
FRANÇOIS GELIS ◽  
TUOMAS LAPPI ◽  
RAJU VENUGOPALAN
Keyword(s):  
Quantum Chromodynamics ◽  
Parton Model ◽  
High Energy ◽  
Color Glass ◽  
Energy Scattering ◽  
Bjorken Scaling ◽  
Gluon Production ◽  
Transverse Resolution ◽  
High Energy Scattering ◽  
Hadronic Collisions

In this series of three lectures, we discuss several aspects of high energy scattering among hadrons in Quantum Chromodynamics. The first lecture is devoted to a description of the parton model, Bjorken scaling and the scaling violations due to the evolution of parton distributions with the transverse resolution scale. The second lecture describes parton evolution at small momentum fraction x, the phenomenon of gluon saturation and the Color Glass Condensate (CGC). In the third lecture, we present the application of the CGC to the study of high energy hadronic collisions, with emphasis on nucleus-nucleus collisions. In particular, we provide the outline of a proof of high energy factorization for inclusive gluon production.

scholarly journals COLOR GLASS CONDENSATE AND GLASMA

2013 ◽  
Vol 28 (01) ◽  
pp. 1330001 ◽  
Author(s):  
FRANÇOIS GELIS
Keyword(s):  
Quark Gluon Plasma ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
High Energy ◽  
Effective Theory ◽  
Color Glass ◽  
Color Glass Condensate ◽  
Saturation Regime ◽  
Initial State ◽  
Ion Collisions

We review the color glass condensate effective theory, that describes the gluon content of a high energy hadron or nucleus, in the saturation regime. The emphasis is put on applications to high energy heavy ion collisions. After describing initial state factorization, we discuss the glasma phase, that precedes the formation of an equilibrated quark–gluon plasma. We end this review with a presentation of recent developments in the study of the isotropization and thermalization of the quark–gluon plasma.

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