Introduction to Quark-Gluon Plasma

The state of art in studying thermodynamic properties of hot and dense nuclear matter is reviewed with the special emphasis on the confinement-deconfinement transition between hadron matter and quark-gluon plasma. The most popular models used for describing deconfinement are analysed, including statistical bootstrap models, pure phase models, the model of clustered quarks, and the string-flip potential model. Predictions of these models are compared with the lattice numerical simulations. It is concluded that precursor fluctuation effects must be taken into account in order to get a realistic description of deconfinement transition. The existence of precursor fluctuations is in line with the dynamical confinement scenario and suggests that deconfinement cannot be considered as a transition between pure hadron and quark-gluon phases. All this supports the concept of cluster coexistence advocated by the authors of this review: Quark-gluon plasma and hadron clusters are different quantum states of the same system, so that any statistical model pretending to treat nuclear matter under extreme conditions must incorporate into itself the probability of these different channels. The ways of constructing statistical models with plasma-cluster coexistence are discussed and thermodynamic properties of such models are analysed.

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“…The low-temperature hadron phase is often modeled [4,7,30] by a gas of massless noninteracting pions, which for the grand potential yields…”

Section: Pure Phase Modelsmentioning

confidence: 99%

Thermodynamics of strong interactions

Yukalov¹,

Yukalova²

1997

Phys. Part. Nucl.

235

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“…It is reasonable from the gravity side to demand that the null energy condition (NEC) [26] and [33] be satisfied. For metric background (2), this impose some constraints on θ and z as,…”

Section: Planar Black Holes With Hyperscaling Violationmentioning

confidence: 99%

“…It is certainly important and interesting to understand about the strongly coupled quark gluon plasma (QGP) [1][2][3][4], since heavy ion collisions experiments has provided a variety of evidences for creation of QGPs at RHIC. Over the recent years, there have been a lot of efforts to study the features of heavy-ion collisions and the QGP.…”

Section: Introductionmentioning

confidence: 99%

Langevin Diffusion in Holographic Backgrounds with Hyperscaling Violation

Sadeghi

Pourasadollah

2014

Advances in High Energy Physics

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In this note we consider a relativistic heavy quark which moves in the quark-gluon plasmas. By using the holographic methods, we analyze the Langevin diffusion process of this relativistic heavy quark. This heavy quark is described by a trailing string attached to a flavor brane and moving at constant velocity. The fluctuations of this string are related to the thermal correlators and the correlation functions are precisely the kinds of objects that we compute in the gravity dual picture. We obtain the action of the trailing string in hyperscaling violation backgrounds and we then find the equations of motion. These equations lead us to construct the Langevin correlator which helps us to obtain the Langevin constants. Using the Langevin correlators we derive the densities spectral and simple analytic expressions in the small and large frequency limits. We examine our works for planar and R-charged black holes with hyperscaling violation and find new constraints on θ in the presence of velocity v.

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“…Heavy-ion collision experiments at RHIC are believed to create a strongly coupled quark gluon plasma (sQGP) [1][2][3]. The QGP is a phase of QCD that is thought to be very similar to the plasma of N = 4 super Yang Mills theory at finite temperature.…”

Section: Introductionmentioning

confidence: 99%

Holographic Brownian motion in $$2+1$$ 2 + 1 dimensional hairy black holes

2014

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In this paper, we investigate the dynamics of a heavy quark for plasmas corresponding to three dimensional hairy black holes. We utilize the AdS/CFT correspondence to study the holographic Brownian motion of this particle with different kinds of hairy black holes. For an uncharged black hole in the low frequency limit we derive analytic expressions for the correlation functions and the response functions and verify that the fluctuation-dissipation theorem holds in the presence of a scalar field against a metric background. In the case of a charged black hole, we think that the results are similar to that derived for an uncharged black hole.

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Introduction to Quark-Gluon Plasma

Abstract: Problems of formation, evolution and detection of quark‐gluon plasma are reviewed to fill a gap between theory and experiment.

Cited by 8 publications

References 75 publications

Thermodynamics of strong interactions

Thermodynamics of strong interactions

Langevin Diffusion in Holographic Backgrounds with Hyperscaling Violation

Holographic Brownian motion in $$2+1$$ 2 + 1 dimensional hairy black holes

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