Chiral Lagrangian for strange hadronic matter
TLDR
In this article, a generalized Lagrangian for the description of hadronic matter based on the linear ϵ-Lagrangian model is proposed. But it is not shown that the Lagrangians of the baryon octet and the spin-0 and spin-1 nonets are invariant to broken scale invariance.Abstract:
A generalized Lagrangian for the description of hadronic matter based on the linear $\mathrm{SU}{(3)}_{L}\ifmmode\times\else\texttimes\fi{}\mathrm{SU}{(3)}_{R}$ $\ensuremath{\sigma}$ model is proposed. Besides the baryon octet, the spin-0 and spin-1 nonets, a gluon condensate associated with broken scale invariance is incorporated. The observed values for the vacuum masses of the baryons and mesons are reproduced. In mean-field approximation, vector and scalar interactions yield a saturating nuclear equation of state. We discuss the difficulties and possibilities to construct a chiral invariant baryon-meson interaction that leads to a realistic equation of state. It is found that a coupling of the strange condensate to nucleons is needed to describe the hyperon potentials correctly. The effective baryon masses and the appearance of an abnormal phase of nearly massless nucleons at high densities are examined. A nonlinear realization of chiral symmetry is considered, to retain a Yukawa-type baryon-meson interaction and to establish a connection to the Walecka model.read more
Citations
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Journal ArticleDOI
NJL-model analysis of dense quark matter
TL;DR: In this article, deconfined quark matter within NJL-type models are reviewed, focusing on the regime of low temperatures and moderate densities, which is not accessible by perturbative QCD.
Journal ArticleDOI
Nuclei in a chiral SU(3) model
TL;DR: In this article, the condensate value of the strange scalar meson is found to be important for the properties of nuclei even without adding hyperons, and the model is reduced to a Walecka model structure embedded in SU(3).
Journal ArticleDOI
Signatures of quark-gluon plasma formation in high energy heavy-ion collisions: a critical review
Steffen A. Bass,Steffen A. Bass,Miklos Gyulassy,Miklos Gyulassy,Horst Stöcker,Walter Greiner +5 more
TL;DR: A critical review on signatures of quark-gluon plasma (QGP) formation is given and the current (1998) experimental status is discussed in this paper, where the authors focus on observables which may yield experimental evidence for QGP formation.
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The phase diagram of nuclear and quark matter at high baryon density
Kenji Fukushima,Chihiro Sasaki +1 more
TL;DR: In this article, a review of theoretical approaches to explore the phase diagram of nuclear and quark matter at high baryon density is presented, with emphasis put on the relevance to quark-matter.
Journal ArticleDOI
Proto-Neutron and Neutron Stars in a Chiral SU(3) Model
TL;DR: In this article, a hadronic chiral SU(3) model is applied to neutron and proto-neutron stars, taking into account trapped neutrinos, finite temperature, and entropy.
References
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Book
Aspects of Symmetry
Sidney Coleman,Sam Treiman +1 more
TL;DR: The review lectures on theoretical high energy physics have few rivals for clarity of exposition and depth of insight as discussed by the authors, and have been widely used as introductions to topics at the frontiers of research.