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Phys. Rev. D 74, 114011 (2006) [10 pages]

Chromomagnetic instability in two-flavor quark matter at nonzero temperature

O. Kiriyama
Institut für Theoretische Physik, J.W. Goethe-Universität, D-60438 Frankfurt am Main, Germany
Received 26 September 2006; published 13 December 2006

We calculate the effective potential of the 2SC/g2SC phases including vector condensates (<gAz6> and <gAz8>) and study the gluonic phase and the single plane-wave Larkin-Ovchinnikov-Fulde-Ferrell state at nonzero temperature. Our analysis is performed within the framework of the gauged Nambu-Jona-Lasinio model. We compute potential curvatures with respect to the vector condensates and investigate the temperature dependence of the Meissner masses squared of gluons of color 4–7 and 8 in the neutral 2SC/g2SC phases. The phase diagram is presented in the plane of temperature and coupling strength. The unstable regions for gluons 4–7 and 8 are mapped out on the phase diagram. We find that, apart from the case of strong coupling, the 2SC/g2SC phases at low temperatures are unstable against the vector condensation until the temperature reaches tens of MeV.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevD.74.114011
DOI: 10.1103/PhysRevD.74.114011
PACS: 12.38.-t; 11.30.Qc; 26.60.+c
  • 12.38.-t
    Quantum chromodynamics
  • 11.30.Qc
    Spontaneous and radiative symmetry breaking in particles and fields
  • 26.60.+c
    Nuclear matter aspects of neutron stars
  • YEAR: 2006
KEYWORDS: quantum chromodynamics, flavour model, quark matter

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