Proton-Nucleus Collisions in the Color Glass Condensate Framework

Blaizot, Jean‐Paul; Gelis, F.; Venugopalan, Raju

doi:10.1142/9789812702159_0015

Cited by 54 publications

(132 citation statements)

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“…In an accompanying paper [1], heretofore referred to as I, we developed the Color Glass Condensate (CGC) framework [2][3][4] to address the case where the parton densities in the projectile are small while those of the target are large. This may be applied for instance to the proton/deuteron-nucleus collisions that are currently being studied at Brookhaven's Relativistic Heavy Ion Collider (RHIC) and will be further studied at the Large Hadron Collider at CERN in the near future.…”

Section: Introductionmentioning

confidence: 99%

“…This may be applied for instance to the proton/deuteron-nucleus collisions that are currently being studied at Brookhaven's Relativistic Heavy Ion Collider (RHIC) and will be further studied at the Large Hadron Collider at CERN in the near future. In our previous paper [1], we solved the Yang-Mills equations, for two light-cone sources, to first order in the density of the dilute projectile and to all orders in the density of the target. Our computations were performed in the Lorenz/covariant gauge ∂ µ A µ = 0.…”

Section: Introductionmentioning

confidence: 99%

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High energy pA collisions in the color glass condensate approach II: quark pair production

Blaizot¹,

Gelis²,

2004

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We compute the production of quark-antiquark pairs in high energy collisions between a small and a large projectile, as in proton-nucleus collisions, in the framework of the Color Glass Condensate. We derive a general expression for quark pair-production, which is not k ⊥ -factorizable. However, k ⊥ -factorization is recovered in the limit of large mass pairs or large quark-anti-quark momenta. Our results are amenable to a simple interpretation and suggest how multi-parton correlations at small x can be quantified in high-energy proton/deuteron-nucleus collisions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High energy pA collisions in the color glass condensate approach II: quark pair production

Blaizot¹,

Gelis²,

2004

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“…The second part, on quark production, will start from the solution of the Yang-Mills equations obtained in the present paper and will be discussed in an accompanying paper [38].…”

Section: Introductionmentioning

confidence: 99%

“…Finally, we comment on the relation of results in our approach to the Glauber multiple scattering formalism. Since this is somewhat outside the main thrust of this paper, we discuss it in a self-contained fashion in appendix C. We conclude in section 6 and set the stage for the results on quark production to be presented in [38].…”

Section: Introductionmentioning

confidence: 99%

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

Blaizot¹,

Gelis²,

2004

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We study gluon production in high energy proton-nucleus collisions in the semi-classical framework of the Color Glass Condensate. We develop a general formalism to compute gluon fields in covariant gauge to lowest order in the classical field of the proton and to all orders in the classical field of the nucleus. The use of the covariant gauge makes the diagrammatic interpretation of the solution more transparnt. k ⊥ -factorization holds to this order for gluon production -Our results for the gluon distribution are equivalent to the prior diagrammatic analysis of Kovchegov and Mueller. We also show that these results are equivalent to the computation of gluon production by Dumitru and McLerran in the Fock-Schwinger gauge. We demonstrate how the Cronin effect arises in this approach, and examine its behavior in the two extreme limits of a) no small-x quantum evolution, and b) fully saturated quantum evolution. In both cases, the formalism reduces to Glauber's formalism of multiple scatterings. We comment on the possible implications of this study for the interpretation of the recent results on Deuteron-Gold collisions at the Relativistic Heavy Ion Collider (RHIC).

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“…When this is allowed, it is possible to obtain analytical expressions for amplitudes and cross sections. This was done in a number of approaches for single quark or gluon production [29][30][31][32][33][34][35][36][37][38], as well as for quark-antiquark production [39][40][41][42][43][44][45][46][47][48] (see [49] for a review). In this paper, we are going to limit our discussion to the case of single gluon production.…”

Section: Introductionmentioning

confidence: 99%

Distribution of multiple scatterings in proton-nucleus collisions at high energy

Borghini¹,

Gelis²

2006

Phys. Rev. D

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We consider proton-nucleus collisions at high energy in the color glass condensate framework, and extract from the gluon production cross section the probabilities of having a definite number of multiple scatterings in the nucleus. Various properties of the distribution of the number of multiple scatterings are studied, and we conclude that events in which the momentum of a hard jet is compensated by many much softer particles on the opposite side are very unlikely except for extreme values of the saturation momentum. In the same framework, we also investigate the possibility to estimate the impact parameter of a proton-nucleus collision, from the measure of the multiplicity of its final state.

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Proton-Nucleus Collisions in the Color Glass Condensate Framework

Cited by 54 publications

References 4 publications

High energy pA collisions in the color glass condensate approach II: quark pair production

High energy pA collisions in the color glass condensate approach II: quark pair production

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

Distribution of multiple scatterings in proton-nucleus collisions at high energy

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