Spin polarization in high density quark matter.

Henrik Bohr, Prafulla K. Panda, Constanca Providênci

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We investigate the occurrence of a ferromagnetic phase transition in high density hadronic matter (e.g., in the interior of a neutron star). This could be induced by a four-fermion interaction analogous to the one which is responsible for chiral symmetry breaking in the Nambu-Jona-Lasinio model, to which it is related through a Fierz transformation. Flavor SU(2) and flavor SU(3) quark matter are considered. A second-order phase transition is predicted at densities about 5 times the normal nuclear matter density. It is also found that in flavor SU(3) quark matter, a first-order transition from the so-called 2 flavor super-conducting phase to the ferromagnetic phase arises. The color-flavor-locked phase may be completely hidden by the FP.
Original languageEnglish
JournalInternational Journal of Modern Physics E
Volume22
Issue number4
Pages (from-to)1350019
ISSN0218-3013
DOIs
Publication statusPublished - 2013

Keywords

  • Quark matter
  • Mean-field approximation
  • Spin-polarization
  • Tensor interaction
  • Color superconductivity
  • Fierz transformation

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