Spin polarization in high density quark matter under a strong external magnetic field

Yasuhiko Tsue, João Da Providência, Constança Providência, Masatoshi Yamamura, Henrik Bohr

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Abstract

In high density quark matter under a strong external magnetic field, possible phases are investigated by using the two-flavor Nambu-Jona-Lasinio (NJL) model with tensor-type four-point interaction between quarks, as well as the axial-vector-type four-point interaction. In the tensor-type interaction under the strong external magnetic field, it is shown that a quark spin polarized phase is realized in all regions of the quark chemical potential under consideration within the lowest Landau level approximation. In the axial-vector-type interaction, it is also shown that the quark spin polarized phase appears in the wide range of the quark chemical potential. In both the interactions, the quark mass in zero and small chemical potential regions increases which indicates that the chiral symmetry breaking is enhanced, namely the magnetic catalysis occurs.
Original languageEnglish
Article number1650106
JournalInternational Journal of Modern Physics E
Volume25
Issue number12
ISSN0218-3013
DOIs
Publication statusPublished - 2016

Keywords

  • Quark matter
  • Spin polarization

Cite this

Tsue, Yasuhiko ; Da Providência, João ; Providência, Constança ; Yamamura, Masatoshi ; Bohr, Henrik. / Spin polarization in high density quark matter under a strong external magnetic field. In: International Journal of Modern Physics E. 2016 ; Vol. 25, No. 12.
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Spin polarization in high density quark matter under a strong external magnetic field. / Tsue, Yasuhiko; Da Providência, João; Providência, Constança; Yamamura, Masatoshi; Bohr, Henrik.

In: International Journal of Modern Physics E, Vol. 25, No. 12, 1650106, 2016.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Spin polarization in high density quark matter under a strong external magnetic field

AU - Tsue, Yasuhiko

AU - Da Providência, João

AU - Providência, Constança

AU - Yamamura, Masatoshi

AU - Bohr, Henrik

PY - 2016

Y1 - 2016

N2 - In high density quark matter under a strong external magnetic field, possible phases are investigated by using the two-flavor Nambu-Jona-Lasinio (NJL) model with tensor-type four-point interaction between quarks, as well as the axial-vector-type four-point interaction. In the tensor-type interaction under the strong external magnetic field, it is shown that a quark spin polarized phase is realized in all regions of the quark chemical potential under consideration within the lowest Landau level approximation. In the axial-vector-type interaction, it is also shown that the quark spin polarized phase appears in the wide range of the quark chemical potential. In both the interactions, the quark mass in zero and small chemical potential regions increases which indicates that the chiral symmetry breaking is enhanced, namely the magnetic catalysis occurs.

AB - In high density quark matter under a strong external magnetic field, possible phases are investigated by using the two-flavor Nambu-Jona-Lasinio (NJL) model with tensor-type four-point interaction between quarks, as well as the axial-vector-type four-point interaction. In the tensor-type interaction under the strong external magnetic field, it is shown that a quark spin polarized phase is realized in all regions of the quark chemical potential under consideration within the lowest Landau level approximation. In the axial-vector-type interaction, it is also shown that the quark spin polarized phase appears in the wide range of the quark chemical potential. In both the interactions, the quark mass in zero and small chemical potential regions increases which indicates that the chiral symmetry breaking is enhanced, namely the magnetic catalysis occurs.

KW - Quark matter

KW - Spin polarization

U2 - 10.1142/S0218301316501068

DO - 10.1142/S0218301316501068

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JO - International Journal of Modern Physics E

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