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Color-glass condensate
About: Color-glass condensate is a research topic. Over the lifetime, 885 publications have been published within this topic receiving 35169 citations.
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TL;DR: In this paper, a series of three lectures on high energy scattering among hadrons in Quantum Chromodynamics is presented. Butler et al. describe the parton model, Bjorken scaling and the scaling violations due to the evolution of parton distributions with the transverse resolution scale.
Abstract: 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.
78 citations
Journal Article•
TL;DR: In this paper, the authors studied two-particle long-range rapidity correlations arising in the early stages of heavy ion collisions in the saturation/color glass condensate framework, assuming that one colliding nucleus is much larger than the other.
Abstract: We study two-particle long-range rapidity correlations arising in the early stages of heavy ion collisions in the saturation/Color Glass Condensate framework, assuming for simplicity that one colliding nucleus is much larger than the other. We calculate the two-gluon production cross section while including all-order saturation effects in the heavy nucleus with the lowest-order rescattering in the lighter nucleus. We find four types of correlations in the two-gluon production cross section: (i) geometric correlations, (ii) HBT correlations accompanied by a back-to-back maximum, (iii) away-side correlations, and (iv) near-side azimuthal correlations which are long-range in rapidity. The geometric correlations (i) are due to the fact that nucleons are correlated by simply being confined within the same nucleus and may lead to long-range rapidity correlations for the produced particles without strong azimuthal angle dependence. Somewhat surprisingly, long-range rapidity correlations (iii) and (iv) have exactly the same amplitudes along with azimuthal and rapidity shapes: one centered around Δ ϕ = π with the other one centered around Δ ϕ = 0 (here Δϕ is the azimuthal angle between the two produced gluons). We thus observe that the early-time CGC dynamics in nucleus–nucleus collisions generates azimuthal non-flow correlations which are qualitatively different from jet correlations by being long-range in rapidity. If strong enough, they have the potential of mimicking the elliptic (and higher-order even-harmonic) flow in the di-hadron correlators: one may need to take them into account in the experimental determination of the flow observables.
78 citations
TL;DR: In this article, a Gaussian approximation to the effective theory for the color glass condensate was constructed, which describes correctly the gluon distribution both in the low density regime at high transverse momenta (above the saturation scale Q s ), and in the high density regime below Q s, and provides a simple interpolation between these two regimes.
77 citations
TL;DR: In this paper, the authors consider the production of J / Ψ in proton (deuteron)−nucleus collisions at high energies and show that the production mechanism in this case is different from that in pp collisions due to gluon saturation in the nucleus and formation of the color glass condensate.
77 citations
TL;DR: In this article, a brief review of phenomenological applications of the gluon saturation approach to the proton-nucleus collisions at high energies is presented, along with a detailed discussion of the effects of the saturation approach.
76 citations