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28 March 2024
 
  » arxiv » nucl-th/0206009

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The hadron-quark phase transition in dense matter and neutron stars
G. F. Burgio ; M. Baldo ; H.-J. Schulze ; P. K. Sahu ;
Date 4 Jun 2002
Journal Phys.Rev. C66 (2002) 025802
Subject nucl-th astro-ph
AffiliationINFN Sezione di Catania, Italy) and P. K. Sahu (Institute of Physics, Bubhaneswar, India
AbstractWe study the hadron-quark phase transition in the interior of neutron stars (NS’s). We calculate the equation of state (EOS) of hadronic matter using the Brueckner-Bethe-Goldstone formalism with realistic two-body and three-body forces, as well as a relativistic mean field model. For quark matter we employ the MIT bag model constraining the bag constant by using the indications coming from the recent experimental results obtained at the CERN SPS on the formation of a quark-gluon plasma. We find necessary to introduce a density dependent bag parameter, and the corresponding consistent thermodynamical formalism. We calculate the structure of NS interiors with the EOS comprising both phases, and we find that the NS maximum masses fall in a relatively narrow interval, $1.4 M_odot leq M_{ m max} leq 1.7 M_odot$. The precise value of the maximum mass turns out to be only weakly correlated with the value of the energy density at the assumed transition point in nearly symmetric nuclear matter.
Source arXiv, nucl-th/0206009
Other source [GID 805079] nucl-th/0206009
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