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Title: Astrophysical Implications of the QCD Phase Transition

Abstract

The possible role of a first order QCD phase transition at nonvanishing quark chemical potential and temperature for cold neutron stars and for supernovae is delineated. For cold neutron stars, we use the NJL model with a nonvanishing color superconducting pairing gap, which describes the phase transition to the 2SC and the CFL quark matter phases at high baryon densities. We demonstrate that these two phase transitions can both be present in the core of neutron stars and that they lead to the appearance of a third family of solution for compact stars. In particular, a core of CFL quark matter can be present in stable compact star configurations when slightly adjusting the vacuum pressure to the onset of the chiral phase transition from the hadronic model to the NJL model. We show that a strong first order phase transition can have a strong impact on the dynamics of core collapse supernovae. If the QCD phase transition sets in shortly after the first bounce, a second outgoing shock wave can be generated which leads to an explosion. The presence of the QCD phase transition can be read off from the neutrino and antineutrino signal of the supernova.

Authors:
 [1];  [2];  [2];  [1];  [3];  [4];  [5];  [5]
  1. Ruprecht-Karls-Universitaet, Heidelberg, Germany
  2. Goethe University, Frankfurt, Germany
  3. University of Basel
  4. ORNL
  5. Universitat Basel, Switzerland
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
951941
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 8th Conference on Quark Confinement and the Hadron Spectrum (QCHS 2008), Mainz, Germany, 20080901, 20080906
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTINEUTRINOS; BAG MODEL; BARYONS; COLD NEUTRONS; COLOR; HADRONS; NEUTRINOS; NEUTRON STARS; QUANTUM CHROMODYNAMICS; QUARK MATTER; QUARKS; SHOCK WAVES; STARS; SUPERNOVAE

Citation Formats

Schaffner-Bielich, J., Sagert, I., Hempel, M., Pagliara, G., Fischer, T., Mezzacappa, Anthony, Thielemann, Friedrich-Karl W., and Liebendoerfer, Matthias. Astrophysical Implications of the QCD Phase Transition. United States: N. p., 2009. Web.
Schaffner-Bielich, J., Sagert, I., Hempel, M., Pagliara, G., Fischer, T., Mezzacappa, Anthony, Thielemann, Friedrich-Karl W., & Liebendoerfer, Matthias. Astrophysical Implications of the QCD Phase Transition. United States.
Schaffner-Bielich, J., Sagert, I., Hempel, M., Pagliara, G., Fischer, T., Mezzacappa, Anthony, Thielemann, Friedrich-Karl W., and Liebendoerfer, Matthias. 2009. "Astrophysical Implications of the QCD Phase Transition". United States. doi:.
@article{osti_951941,
title = {Astrophysical Implications of the QCD Phase Transition},
author = {Schaffner-Bielich, J. and Sagert, I. and Hempel, M. and Pagliara, G. and Fischer, T. and Mezzacappa, Anthony and Thielemann, Friedrich-Karl W. and Liebendoerfer, Matthias},
abstractNote = {The possible role of a first order QCD phase transition at nonvanishing quark chemical potential and temperature for cold neutron stars and for supernovae is delineated. For cold neutron stars, we use the NJL model with a nonvanishing color superconducting pairing gap, which describes the phase transition to the 2SC and the CFL quark matter phases at high baryon densities. We demonstrate that these two phase transitions can both be present in the core of neutron stars and that they lead to the appearance of a third family of solution for compact stars. In particular, a core of CFL quark matter can be present in stable compact star configurations when slightly adjusting the vacuum pressure to the onset of the chiral phase transition from the hadronic model to the NJL model. We show that a strong first order phase transition can have a strong impact on the dynamics of core collapse supernovae. If the QCD phase transition sets in shortly after the first bounce, a second outgoing shock wave can be generated which leads to an explosion. The presence of the QCD phase transition can be read off from the neutrino and antineutrino signal of the supernova.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2009,
month = 1
}

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