Search results for "LARGE NUCLEI"

showing 3 items of 3 documents

Tracing the origin of azimuthal gluon correlations in the color glass condensate

2016

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 physics of fluctuating color fields in the color glass condensate (CGC) effective theory generates these azimuthal multiparticle correlations and compute the corresponding Fourier coefficients v_n within different CGC approximation schemes. We discuss in detail the qualitative and quantitative differences between the different schemes. We will show how a recently introduced color field domain model that captures key features of the observed azimuthal correlati…

Nuclear and High Energy PhysicsParticle physicsNuclear TheoryField (physics)LARGE NUCLEIFOS: Physical sciencesParton01 natural sciencesFLUX TUBES114 Physical sciencesColor-glass condensateNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)DEPENDENCE0103 physical sciencesEffective field theorySCATTERINGStatistical physicsLIGHT ION COLLISIONSheavy ion phenomenology010306 general physicsNuclear ExperimentFourier seriesPhysicsta114010308 nuclear & particles physicsScatteringPB COLLISIONSQUARKTRANSVERSE-MOMENTUMENERGY PA-COLLISIONSQCD phenomenologyEVOLUTION3. Good healthGluonAzimuthHigh Energy Physics - PhenomenologyJournal of High Energy Physics
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JIMWLK evolution of the odderon

2016

We study the effects of a parity-odd "odderon" correlation in JIMWLK renormalization group evolution at high energy. Firstly we show that in the eikonal picture where the scattering is described by Wilson lines, one obtains a strict mathematical upper limit for the magnitude of the odderon amplitude compared to the parity even pomeron one. This limit increases with N_c, approaching infinity in the infinite N_c limit. We use a systematic extension of the Gaussian approximation including both 2- and 3-point correlations which enables us to close the system of equations even at finite N_c. In the large-N_c limit we recover an evolution equation derived earlier. By solving this equation numeric…

SMALL-X EVOLUTIONWilson loopNuclear TheoryLARGE NUCLEIWilson linesFOS: Physical sciencesField (mathematics)114 Physical sciences01 natural sciencesHIGH-ENERGY SCATTERINGColor-glass condensateRENORMALIZATION-GROUPNuclear Theory (nucl-th)GLUON DISTRIBUTION-FUNCTIONSPomeronHigh Energy Physics - Phenomenology (hep-ph)Quantum mechanicsquantum chromodynamics0103 physical sciencesEQUATION010306 general physicsPhysicsta114evolution equations010308 nuclear & particles physicsScatteringEikonal equationHERA-DATAHigh Energy Physics::PhenomenologyCOLOR GLASS CONDENSATEodderonRenormalization groupHigh Energy Physics - PhenomenologyAmplitudeJIMWLKPA-COLLISIONSBK EVOLUTION
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Structure of longitudinal chromomagnetic fields in high energy collisions

2014

We compute expectation values of spatial Wilson loops in the forward light cone of high-energy collisions. We consider ensembles of gauge field configurations generated from a classical Gaussian effective action as well as solutions of high-energy renormalization group evolution with fixed and running coupling. The initial fields correspond to a color field condensate exhibiting domain-like structure over distance scales of order the saturation scale. At later times universal scaling emerges at large distances for all ensembles, with a nontrivial critical exponent. Finally, we compare the results for the Wilson loop to the two-point correlator of magnetic fields.

We compute expectation values of spatial Wilson loops in the forward light cone of high-energy collisions. We consider ensembles of gauge field configurations generated from a classical Gaussian effective action as well as solutions of high-energy renormalization group evolution with fixed and running coupling. The initial like structure over distance scales of oder the saturation scale. At later times universal scaling emerges at large distances for all ensembles with a nontrivial critical exponent. Finally we compare the resulats for the Wilson loop to the two-point correlator of magnetic fields. (C) 2014 The Authors. Published by Elsevier BV This is an open access article under the CC BY licenseNuclear and High Energy PhysicsWilson loopLARGE NUCLEINuclear TheoryField (physics)FOS: Physical sciences114 Physical sciences01 natural sciencesColor-glass condensateRENORMALIZATION-GROUPNuclear Theory (nucl-th)GLUON DISTRIBUTION-FUNCTIONSHigh Energy Physics - Phenomenology (hep-ph)Light cone0103 physical sciencesSCATTERINGGauge theory010306 general physicsSMALL-XEffective actionPhysicsCORRELATORSta114010308 nuclear & particles physicsCOLOR GLASS CONDENSATERenormalization groupEVOLUTIONJIMWLK EQUATIONHigh Energy Physics - PhenomenologySATURATIONQuantum electrodynamicsCritical exponentPhysics Letters B
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