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Title: Equation of State for a Quark Gluon Plasma in the Fuzzy Bag Model

Abstract

We study two distinct phases of nuclear matter, a baryon-meson phase and a quark-gluon phase (QGP). For the baryon-meson phase we develop an equation of state (EoS) using a quark-meson formulation based on a new version of the fuzzy bag model with scalar-isoscalar, vector-isoscalar and vector-isovector meson-quark couplings and leptonic degrees of freedom as well as the constraints of chemical equilibrium, baryon number and electric charge conservation. For the QGP phase we model an EoS for asymptotically free massless quarks and gluons using the MIT approach and a temperature and baryon chemical potential dependent bag constant, B(T,{mu}), which allows an isentropic equilibrium phase transition from a QGP to a hadron gas. Our main results indicate the EoS and static global properties of neutron stars and protoneutron stars at low and moderate values of temperature are slightly modified in comparison to the predictions based on the MIT bag model with a constant B.

Authors:
;  [1];  [2];  [3]
  1. Instituto de Fisica, Universidade Federal do Rio Grande do Sul, CEP 91501-970, Porto Alegre, RS (Brazil)
  2. Instituto de Fisica e Matematica, Universidade Federal de Pelotas, CEP 96010-900 Pelotas, Rio Grande do Sul (Brazil)
  3. Institut fuer Theoretische Physik III, der Universitaet Erlangen-Nuernberg, D91058 Erlangen (Germany)
Publication Date:
OSTI Identifier:
20630365
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 739; Journal Issue: 1; Conference: Joint meeting on QCD and QCP: 9. hadron physics and 7. relativistic aspects of nuclear physics, Rio de Janeiro (Brazil), 28 Mar - 3 Apr 2004; Other Information: DOI: 10.1063/1.1843630; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B QUARKS; BAG MODEL; BARYON NUMBER; BARYONS; COMPARATIVE EVALUATIONS; CONSERVATION LAWS; DEGREES OF FREEDOM; ELECTRIC CHARGES; EQUATIONS OF STATE; EQUILIBRIUM; GLUONS; ISOVECTORS; MESON-BARYON INTERACTIONS; MESONS; NEUTRON STARS; NUCLEAR MATTER; PHASE TRANSFORMATIONS; POTENTIALS; QUARK MATTER; QUARK-HADRON INTERACTIONS

Citation Formats

Jacobsen, R B, Vasconcellos, C A.Z., Bodmann, Bardo E.J., and Dillig, Manfred. Equation of State for a Quark Gluon Plasma in the Fuzzy Bag Model. United States: N. p., 2004. Web. doi:10.1063/1.1843630.
Jacobsen, R B, Vasconcellos, C A.Z., Bodmann, Bardo E.J., & Dillig, Manfred. Equation of State for a Quark Gluon Plasma in the Fuzzy Bag Model. United States. doi:10.1063/1.1843630.
Jacobsen, R B, Vasconcellos, C A.Z., Bodmann, Bardo E.J., and Dillig, Manfred. Thu . "Equation of State for a Quark Gluon Plasma in the Fuzzy Bag Model". United States. doi:10.1063/1.1843630.
@article{osti_20630365,
title = {Equation of State for a Quark Gluon Plasma in the Fuzzy Bag Model},
author = {Jacobsen, R B and Vasconcellos, C A.Z. and Bodmann, Bardo E.J. and Dillig, Manfred},
abstractNote = {We study two distinct phases of nuclear matter, a baryon-meson phase and a quark-gluon phase (QGP). For the baryon-meson phase we develop an equation of state (EoS) using a quark-meson formulation based on a new version of the fuzzy bag model with scalar-isoscalar, vector-isoscalar and vector-isovector meson-quark couplings and leptonic degrees of freedom as well as the constraints of chemical equilibrium, baryon number and electric charge conservation. For the QGP phase we model an EoS for asymptotically free massless quarks and gluons using the MIT approach and a temperature and baryon chemical potential dependent bag constant, B(T,{mu}), which allows an isentropic equilibrium phase transition from a QGP to a hadron gas. Our main results indicate the EoS and static global properties of neutron stars and protoneutron stars at low and moderate values of temperature are slightly modified in comparison to the predictions based on the MIT bag model with a constant B.},
doi = {10.1063/1.1843630},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 739,
place = {United States},
year = {2004},
month = {12}
}