Critical Behaviour of Hadronic Matter and Compressible Bag Model

Kagiyama, Shigenori; Minaka, Akira; Nakamura, Akihiro

doi:10.1143/ptp.89.1227

Cited by 7 publications

(19 citation statements)

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“…But even if the number of hadrons is restricted to those needed for a successful description of hadronic final states in heavy ion and elementary particle collisions, the entropy quickly exceeds that observed on the lattice. Meanwhile many papers have addressed this issue ranging from QCD-based approaches (see for example [13,15,16]) to various generalizations of the hadron gas [17][18][19][20][21][22][23][24][25][26][27]. In this article we will study the transition region, and we will provide a simple and intuitive modification to the hadron gas model in order to qualitatively reproduce the crossover transition observed in Lattice QCD [28].…”

Section: Introductionmentioning

confidence: 99%

Crossover transition in bag-like models

Ferroni

Koch

2009

Phys. Rev. C

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We formulate a simple model for a gas of extended hadrons at zero chemical potential by taking inspiration from the compressible bag model. We show that a crossover transition qualitatively similar to lattice QCD can be reproduced by such a system by including some appropriate additional dynamics. Under certain conditions, at high temperature, the system consist of a finite number of infinitely extended bags, which occupy the entire space. In this situation the system behaves as an ideal gas of quarks and gluons.Comment: Corresponds to the published version. Added few references and changed the titl

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Section: Introductionmentioning

confidence: 99%

Crossover transition in bag-like models

Ferroni

Koch

2009

Phys. Rev. C

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“…(3.1) refers to the dynamics of its center of mass. Since extended hadrons are assumed not to overlap their motion is restricted to the available space V ′ defined as [11,12]…”

Section: Relativistic Effective Lagrangian For Pointlike Baryonsmentioning

confidence: 99%

“…This condition will be labelled as QMCb in what follows. It must be mentioned that a similar condition can be obtained by minimizing the energy density ǫ with respect to the effective bag volume v B , keeping constant the total volume V , namely [11,12] − n B s n B…”

Section: The Quark Meson Coupling Modelmentioning

confidence: 99%

Neutron star structure in a quark model with excluded volume correction

Aguirre

Paoli

2003

Phys. Rev. C

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We study the effects of the finite size of baryons on the equation of state of homogeneous hadronic matter. The finite extension of hadrons is introduced in order to improve the performance of field theoretical models at very high densities. We simulate the in-medium averaged baryon-baryon strong repulsion at very short distances by introducing a Van der Waals like normalization of the fields. This is done in the framework of the Quark Meson Coupling model, that allows to take care of the quark structure of baryons. Since within this model the confinement volume evolves with the fields configuration, the treatment is not equivalent to a simple hard-core potential. We investigate the phase transition to quark matter and the structure of neutron stars. We have found significant corrections at high densities.Comment: 26 pages, 7 Postscript figures, Figures and references added, results unchange

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“…Attempts to remove this drawback were made in Refs. [7,11] (see also [12,13]). Moreover, it will be shown below that the EVM becomes inaccurate at high densities when the total volume of constituents exceeds 10-20% of the 1 Units = c = 1 are used throughout the paper.…”

Section: Introductionmentioning

confidence: 99%