STRANGE QUARK MATTER IN THE FRAMEWORK OF ONE GLUON EXCHANGE AND DENSITY AND TEMPERATURE DEPENDENT PARTICLE MASS MODELS

2008 ◽  
Vol 17 (07) ◽  
pp. 1335-1355 ◽  
Author(s):  
M. MODARRES ◽  
H. GHOLIZADE
Keyword(s):  
Quark Matter ◽  
Fermi Liquid ◽  
Strange Quark ◽  
String Model ◽  
Strange Quark Matter ◽  
Particle Mass ◽  
Temperature Dependent ◽  
Mass Model ◽  
Gluon Exchange ◽  
The One

We calculate the thermodynamic properties of strange quark matter by using the density and temperature dependent particle mass model of Wen et al. For the interaction Hamiltonian we use the one gluon exchange interaction obtained from the Fermi liquid picture. We let the QCD coupling (αc) be constant or vary with density and temperature. A new set of mass scalings for quarks is evaluated from the present interaction, which can be used with thermodynamic formulas derived by Wen et al. Similar to β-stable matter, no stability is found in strange quark matter. Finally, it is shown that the present equation of state of strange quark matter becomes harder with respect to that obtained using the string model, specially with non-constant QCD coupling.

scholarly journals Bulk viscosity of strange quark matter in density dependent quark mass model

Pramana ◽  
2000 ◽  
Vol 54 (5) ◽  
pp. 737-749 ◽  
Author(s):  
J D Anand ◽  
N Chandrika Devi ◽  
V K Gupta ◽  
S Singh
Keyword(s):  
Bulk Viscosity ◽  
Quark Matter ◽  
Quark Mass ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Mass Model ◽  
Density Dependent

Strange quark matter and proto-strange stars in a baryon density-dependent quark mass model

2022 ◽  
Author(s):  
Huaimin Chen ◽  
Cheng-Jun Xia ◽  
Guang-Xiong Peng
Keyword(s):  
Free Energy ◽  
Quark Matter ◽  
Quark Mass ◽  
Strange Quark ◽  
Baryon Density ◽  
Strange Quark Matter ◽  
Mass Model ◽  
Relativistic Limit ◽  
Strange Stars ◽  
Mass Scaling

Abstract The properties of strange quark matter and the structures of (proto-)strange stars are studied within the framework of a baryon density-dependent quark mass model, where a new quark mass scaling and self-consistent thermodynamic treatment are adopted. Our results show that the perturbative interaction has a strong impact on the properties of strange quark matter. It is found that the energy per baryon increases with temperature, while the free energy decreases and eventually becomes negative. At fixed temperatures, the pressure at the minimum free energy per baryon is zero, suggesting that the thermodynamic self-consistency is preserved. Additionally, the sound velocity v in quark matter approaches to the extreme relativistic limit (c=p3) as the density increases. By increasing the strengths of confinement parameter D and perturbation parameter C, the tendency for v to approach the extreme relativistic limit at high density is slightly weakened. For (proto-)strange stars, in contrast to the quark mass scalings adopted in previous publications, the new quark mass scaling can accommodate massive proto-strange stars with their maximum mass surpassing twice the solar mass by considering the isentropic stages along the star evolution line, where the entropy per baryon of the star matter was set to be 0.5 and 1 with the lepton fraction Yl=0.4.

Strange Quark Matter as Dark Matter

2019 ◽  
Vol 22 (4) ◽  
pp. 311-317
Author(s):  
Hidezumi Terazawa
Keyword(s):  
Dark Matter ◽  
Quark Matter ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Quark Stars

New forms of matter such as super-hypernuclei (strange quark matter) and superhypernuclear stars (strange quark stars) as candidates for dark matter are discussed in some detail, based on the so-called "Bodmer–Terazawa–Witten hypothesis" assuming that they are stable absolutely or quasi-stable (decaying only weakly).

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