Volume Effect of Bound States in Quark-Gluon Plasma

Mei, Hong; Gao, Chao-Ying; Zhuang, Pengfei

doi:10.1088/0253-6102/46/6/016

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…For dense matter, the general VDW partition function and statistical method of Eu [22] with the multicomponent partition function method of Keffer [23], as developed by Vovchenko [24][25][26][27], has the advantages of including the excluded particle volume, incorporating attractive and repulsive interactions, exhibiting a first-order phase transition, including multicomponent mixtures, showing binodal and spinodal behavior, having a well-defined chemical potential, and exhibiting a critical point. VDW-based models have become an important way to gain insight into the hadronic deconfining phase transition [28][29][30] and as a model for a hadronic gaseous state [31]. Here we will apply the VDW EoS to a system of hexaquarks where the hexaquarks can have different internal structures consisting of diquark and triquark states [32].…”

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confidence: 99%

The van der Waals Hexaquark Chemical Potential in Dense Stellar Matter

Andrew

Steinfelds

Andrew³

2023

Particles

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We explore the chemical potential of a QCD-motivated van der Waals (VDW) phase change model for the six-quark color-singlet, strangeness S = −2 particle known as the hexaquark with quark content (uuddss). The hexaquark may have internal structure, indicated by short range correlations that allow for non-color-singlet diquark and triquark configurations whose interactions will change the magnitude of the chemical potential. In the multicomponent VDW Equation of State (EoS), the quark-quark particle interaction terms are sensitive to the QCD color factor, causing the pairing of these terms to give different interaction strengths for their respective contributions to the chemical potential. This results in a critical temperature near 163 MeV for the color-singlet states and tens of MeV below this for various mixed diquark and triquark states. The VDW chemical potential is also sensitive to the number density, leading to chemical potential isotherms that exhibit spinodal extrema, which also depend upon the internal hexaquark configurations. These extrema determine regions of metastability for the mixed states near the critical point. We use this chemical potential with the chemical potential-modified TOV equations to investigate the properties of hexaquark formation in cold compact stellar cores in beta equilibrium. We find thresholds for hexaquark layers and changes in maximum mass values that are consistent with observations from high mass compact stellar objects such as PSR 09043 + 10 and GW 190814. In general, we find that the VDW-TOV model has an upper stability mass and radius bound for a chemical potential of 1340 MeV with a compactness of C~0.2.

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Section: Introductionmentioning

confidence: 99%

The van der Waals Hexaquark Chemical Potential in Dense Stellar Matter

Andrew

Steinfelds

Andrew³

2023

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Landau parameters for isospin asymmetric nuclear matter based on a relativistic model of composite and finite extension nucleons

Aguirre

Paoli

2007

Phys. Rev. C

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We study the properties of cold asymmetric nuclear matter at high density, applying the quark meson coupling model with excluded volume corrections in the framework of the Landau theory of relativistic Fermi liquids. We discuss the role of the finite spatial extension of composite baryons on dynamical and statistical properties such as the Landau parameters, the compressibility, and the symmetry energy. We have also calculated the low lying collective eigenfrequencies arising from the collisionless quasiparticle transport equation, considering both unstable and stable modes. An overall analysis of the excluded volume correlations on the collective properties is performed.

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Hadronization approach for a quark-gluon plasma formed in relativistic heavy ion collisions

2007

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A transport model is developed to describe hadron emission from a strongly coupled quark-gluon plasma formed in relativistic heavy ion collisions. The quark-gluon plasma is controlled by ideal hydrodynamics, and the hadron motion is characterized by a transport equation with loss and gain terms. The two sets of equations are coupled to each other, and the hadronization hypersurface is determined by both the hydrodynamic evolution and the hadron emission. The model is applied to calculate the transverse momentum distributions of mesons and baryons, and most of the results agree well with the experimental data at RHIC.

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Volume Effect of Bound States in Quark-Gluon Plasma

Cited by 3 publications

References 21 publications

The van der Waals Hexaquark Chemical Potential in Dense Stellar Matter

The van der Waals Hexaquark Chemical Potential in Dense Stellar Matter

Landau parameters for isospin asymmetric nuclear matter based on a relativistic model of composite and finite extension nucleons

Hadronization approach for a quark-gluon plasma formed in relativistic heavy ion collisions

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