QCD matter in extreme environments

Fukushima, Kenji

doi:10.1088/0954-3899/39/1/013101

Cited by 82 publications

(70 citation statements)

References 204 publications

(346 reference statements)

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“…As is known, see e.g. recent review paper [73] and references therein, these Z N domain walls interpolate between topologically different but physically identical states connected by large gauge transformations similar to our discussions at the end of section II B. At high temperature these objects can be described in terms of classical equation of motion.…”

Section: B Insights From Numerical Lattice Simulations and Holographsupporting

confidence: 72%

Local violation effects and thermalization in QCD: Views from quantum field theory and holography

Zhitnitsky

2012

Nuclear Physics A

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We argue that the local violation of P and CP invariance in heavy ion collisions and the universal thermal aspects observed in high energy collisions are in fact two sides of the same coin, and both are related to quantum anomalies of QCD. We argue that the low energy relations representing the quantum anomalies of QCD are saturated by coherent low dimensional vacuum configurations as observed in Monte Carlo lattice studies. The thermal spectrum and approximate universality of the temperature with no dependence on energy of colliding particles in this framework is due to the fact that the emission results from the distortion of these low dimensional vacuum sheets rather than from the colliding particles themselves. The emergence of the long-range correlations of P odd domains (a feature which is apparently required for explanation of the asymmetry observed at RHIC and LHC) is also a result of the same distortion of the QCD vacuum configurations. We formulate the corresponding physics using the effective low energy effective Lagrangian. We also formulate the same physics in terms of the dual holographic picture when low-dimensional sheets of topological charge embedded in 4d space, as observed in Monte Carlo simulations, are identified with D2 branes. Finally, we argue that study of these long range correlations in heavy ion collisions could serve as a perfect test of a proposal that the observed dark energy in present epoch is a result of a tiny deviation of the QCD vacuum energy in expanding universe from its conventional value in Minkowski spacetime.

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Section: B Insights From Numerical Lattice Simulations and Holographsupporting

confidence: 72%

Local violation effects and thermalization in QCD: Views from quantum field theory and holography

Zhitnitsky

2012

Nuclear Physics A

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“…Low-energy QCD models, such as Nambu-Jona-Lasinio-type (NJL) and quark-mesontype (QM) models, open valuable insights into the dynamics underlying the structure of the QCD phase diagram, see, e.g., Refs. [1][2][3][4] for reviews. However, model studies usually require to fix a set of parameters such that a given set of low-energy observables at vanishing temperature and quark chemical potential is recovered correctly.…”

Section: Introductionmentioning

confidence: 99%

QCD-inspired determination of NJL model parameters

et al. 2017

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Abstract. The QCD phase diagram at finite temperature and density has attracted considerable interest over many decades now, not least because of its relevance for a better understanding of heavy-ion collision experiments. Models provide some insight into the QCD phase structure but usually rely on various parameters. Based on renormalization group arguments, we discuss how the parameters of QCD low-energy models can be determined from the fundamental theory of the strong interaction. We particularly focus on a determination of the temperature dependence of these parameters in this work and comment on the effect of a finite quark chemical potential. We present first results and argue that our findings can be used to improve the predictive power of future model calculations.

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“…Of course, qq and L T are true order parameters in the opposite limits of vanishing quark masses (chiral limit) and for infinitely quark masses (gluodynamics) respectively, while the true cross-over is defined by inflexion points of both qq and L T . The expectation that a phase transition between a hadronic phase to the quark-gluon plasma phase could be observed on the laboratory has inspired a wealth of work in recent years [7].…”

Section: Introductionmentioning

confidence: 99%