Topic
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 article, it was shown that in the saturation regime, the width of the transverse momentum distribution is infrared finite and grows rapidly with energy and rapidity, and that it is (up to logarithm) infrared safe.
Abstract: We prove that the inclusive single-gluon production cross section for a hadron colliding with a high-density target factorizes into the gluon distribution function of the projectile, defined as usual within the DGLAP collinear approximation, times the cross section for scattering of a single gluon on the strong classical color field of the target. We then derive the gluon-proton (nucleus) inelastic cross section and show that it is (up to logarithms) infrared safe and that it grows slowly with center of mass energy. Furthermore, we discuss jet transverse momentum broadening for the case of nuclear targets. We show that in the saturation regime, in contrast to the perturbative regime, the width of the transverse momentum distribution is infrared finite and grows rapidly with energy and rapidity. In both regimes, however, transverse momentum broadening exibits the same dependence on atomic number A.
9 citations
TL;DR: In this article, a brief review on the elliptic flow measurements of multistrange hadrons in relativistic heavy ion collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) is given.
Abstract: Strange hadrons, especially multistrange hadrons, are good probes for the early partonic stage of heavy ion collisions due to their small hadronic cross sections. In this paper, I give a brief review on the elliptic flow measurements of strange and multistrange hadrons in relativistic heavy ion collisions at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC).
9 citations
TL;DR: In this paper, the color glass condensate effective theory was improved by taking fully into account the first α s correction to the leading order solution, as well as a subset of higher order corrections.
9 citations
01 Jan 2008
TL;DR: Tarnowsky et al. as discussed by the authors studied long-range multiplicity correlations in relativistic heavy ion collisions as a signal for dense partonic matter, and showed that the underlying mechanism creating these long-term correlations in the bulk matter is due to multiple partonic interactions.
Abstract: Tarnowsky, Terence J. Ph.D., Purdue University, May 2008. Long-Range Multiplicity Correlations in Relativistic Heavy Ion Collisions as a Signal for Dense Partonic Matter. Major Professor: Rolf P. Scharenberg. A dense form of matter is formed in relativistic heavy ion collisions. The constituent degrees of freedom in this dense matter are currently unknown. Long-range, forward-backward multiplicity correlations (LRC) are expected to arise due to multiple partonic interactions. Model independent and dependent arguments suggest that such correlations are due to multiple partonic interactions. These correlations are predicted in the context of the Dual Parton Model (DPM). The DPM describes soft partonic processes and hadronization. This model indicates that the underlying mechanism creating these long-range multiplicity correlations in the bulk matter is due to multiple partonic interactions. In this thesis, long-range multiplicity correlations have been studied in heavy ion (Au+Au and Cu+Cu) and hadron-hadron (pp) collisions. The behavior has been studied as a function of pseudorapidity gap (∆η) about η = 0, the centrality, atomic number, and incident energy dependence of the colliding particles. Strong, long-range correlations (∆η > 1.0) as a function of ∆η are found for central collisions of heavy ions at an energy of √ sNN = 200 GeV. This indicates substantial amounts of dense partonic matter are formed in central heavy ion collisions at an energy of √ sNN = 200 GeV.
9 citations
TL;DR: In this article, the authors investigated the scattering of a quark on a heavy nucleus at high energies using the time-dependent basis light-front quantization (tBLFQ) formalism.
Abstract: We investigate the scattering of a quark on a heavy nucleus at high energies using the time-dependent basis light-front quantization (tBLFQ) formalism, which is the first application of the tBLFQ formalism in QCD. We present the real-time evolution of the quark wave function in a strong classical color field of the relativistic nucleus, described as the color glass condensate. The quark and the nucleus color field are simulated in the QCD SU(3) color space. We calculate the total and the differential cross sections, and the quark distribution in coordinate and color spaces using the tBLFQ approach. We recover the eikonal cross sections in the eikonal limit. We find that the differential cross section from the tBLFQ simulation is in agreement with a perturbative calculation at large ${p}_{\ensuremath{\perp}}$, and it deviates from the perturbative calculation at small ${p}_{\ensuremath{\perp}}$ due to higher-order contributions. In particular, we relax the eikonal limit by letting the quark carry realistic finite longitudinal momenta. We study the sub-eikonal effect on the quark through the transverse coordinate distribution of the quark with different longitudinal momentum, and we find the sub-eikonal effect to be sizable. Our results can significantly reduce the theoretical uncertainties in small ${p}_{\ensuremath{\perp}}$ region which has important implications to the phenomenology of the hadron-nucleus and deep inelastic scattering at high energies.
9 citations