Stability of strange quark matter: MIT bag versus color dielectric model

Alberico, W. M.; Drago, A.; Ratti, Claudia

doi:10.1016/s0375-9474(02)00680-2

Cited by 14 publications

(19 citation statements)

References 42 publications

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“…We adopted S = 7.15 GeV and Λ = T c , where T c is the value of the critical temperature computed in the model. These parameter values are also consistent with the more general form for g 2 introduced in [40] (see note 4). Notice that the value of the critical temperature is not modified by the perturbative corrections and can therefore be computed before the latter are taken into account.…”

Section: Resultssupporting

confidence: 85%

Evaporation of the gluon condensate: a model for pure gauge SU(3)c phase transition

2004

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We interpret lattice data for the equation of state of pure gauge SU (3) c by an evaporation model. At low temperatures gluons are frozen inside the gluon condensate, whose dynamics is described in terms of a dilaton lagrangian. Above the critical temperature quasifree gluons evaporate from the condensate: a first order transition is obtained by minimizing the thermodynamical potential of the system. Within the model it is possible to reproduce lattice QCD results at finite temperature for thermodynamical quantities such as pressure and energy. The gluonic longitudinal mass can also be evaluated; it vanishes below the critical temperature, where it shows a discontinuity. At very large temperatures we recover the perturbative scenario and gluons are the only asymptotic degrees of freedom.

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Section: Resultssupporting

confidence: 85%

Evaporation of the gluon condensate: a model for pure gauge SU(3)c phase transition

2004

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“…The high stability of the 56 Fe nucleus (the binding energy per nucleon is maximum at A ≈ 56) requires that to have the strange quark matter as the ground state of the quark matter, the energy per unit of baryonic number should satisfies the condition ρ [9][10].…”

Section: Results and Conclusionmentioning

confidence: 99%

Domain of parameters in a model with density-dependent quark mass

Assis¹,

Duarte²

2012

Proceedings of XXXIV Edition of the Brazilian Workshop on Nuclear Physics — PoS(XXXIV BWNP)

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The strange quark matter in the CFL (Color-Flavor-Locked) superconducting phase at zero temperature has been taken as the ground state of Quantum Chromodynamics (QCD) for light flavors (u, d, s) [1]. In this work, the CFL matter is being studied in a phenomenological approach where the interaction between quarks is taken into account by incorporating a density dependence of the in-medium quark mass in the calculation. The pairing effect is considered in the thermodynamical potential of the system, taking the CFL superconducting gap as a free parameter. The stability of the superconducting quark matter is discussed analyzing the equation of state of the system for different values of the parameters used for the description of the employed phenomenological model. The main purpose here is to study the limit values of these parameters to maintain the CFL phase as the lowest energy state of the quark matter.

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“…The present contribution is largely based on the results of ref. [13], with a special focus on the model dependence of the strangelets stability. We consider homogeneous quark matter made up of u, d and s quarks, without imposing chemical equilibrium on the density of the strange quarks.…”

Section: Introductionmentioning

confidence: 99%

Stability of strange quark matter: model dependence

Alberico¹,

Ratti²

2002

AIP Conference Proceedings

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The minimum energy per baryon number of strange quark matter is studied, as a function of the strangeness fraction, in the MIT bag model and in two different versions of the Color Dielectric Model: a comparison is made with the hyperon masses having the same strangeness fraction, and coherently calculated within both models. Calculations are carried out in mean field approximation, with one gluon exchange corrections. The results allow to discuss the model dependence of the stability of strangelets: they can be stable in the MIT bag model and in the double minimum version of the Color Dielectric Model, while the single minimum version of the Color Dielectric Model excludes this possibility.

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Stability of strange quark matter: MIT bag versus color dielectric model

Cited by 14 publications

References 42 publications

Evaporation of the gluon condensate: a model for pure gauge SU(3)c phase transition

Evaporation of the gluon condensate: a model for pure gauge SU(3)c phase transition

Domain of parameters in a model with density-dependent quark mass

Stability of strange quark matter: model dependence

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