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《中国物理C》（英文）编辑部
2024年10月30日
Chinese Physics C> 2016, Vol. 40> Issue(2) : 023102 DOI: 10.1088/1674-1137/40/2/023102

Survival of charged ρ condensation at high temperature and density

  • 1.

      Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 2.

     Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 3.

     Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China

  • The charged vector ρ mesons in the presence of external magnetic fields at finite temperature T and chemical potential μ have been investigated in the framework of the Nambu-Jona-Lasinio model. We compute the masses of charged ρ mesons numerically as a function of the magnetic field for different values of temperature and chemical potential. The self-energy of the ρ meson contains the quark-loop contribution, i.e. the leading order contribution in 1/Nc expansion. The charged ρ meson mass decreases with the magnetic field and drops to zero at a critical magnetic field eBc, which indicates that the charged vector meson condensation, i.e. the electromagnetic superconductor can be induced above the critical magnetic field. Surprisingly, it is found that the charged ρ condensation can even survive at high temperature and density. At zero temperature, the critical magnetic field just increases slightly with the chemical potential, which indicates that charged ρ condensation might occur inside compact stars. At zero density, in the temperature range 0.2-0.5 GeV, the critical magnetic field for charged ρ condensation is in the range of 0.2-0.6 GeV2, which indicates that a high temperature electromagnetic superconductor might be created at LHC.
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Hao Liu, Lang Yu and Mei Huang. Survival of charged ρ condensation at high temperature and density[J]. Chinese Physics C, 2016, 40(2): 023102. doi: 10.1088/1674-1137/40/2/023102
Hao Liu, Lang Yu and Mei Huang. Survival of charged ρ condensation at high temperature and density[J]. Chinese Physics C, 2016, 40(2): 023102.  doi: 10.1088/1674-1137/40/2/023102 shu
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Received: 2015-07-23
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    Supported by the NSFC (11275213, 11261130311) (CRC 110 by DFG and NSFC), CAS Key Project (KJCX2-EW-N01), and Youth Innovation Promotion Association of CAS. L.Yu is Partially Supported by China Postdoctoral Science Foundation (2014M550841)

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Survival of charged ρ condensation at high temperature and density

    Corresponding author: Hao Liu,
    Corresponding author: Lang Yu,
    Corresponding author: Mei Huang,
  • 1.  Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 3. Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China
  • Received Date: 2015-07-23
  • Available Online: 2016-02-20
Fund Project:  Supported by the NSFC (11275213, 11261130311) (CRC 110 by DFG and NSFC), CAS Key Project (KJCX2-EW-N01), and Youth Innovation Promotion Association of CAS. L.Yu is Partially Supported by China Postdoctoral Science Foundation (2014M550841)

Abstract: The charged vector ρ mesons in the presence of external magnetic fields at finite temperature T and chemical potential μ have been investigated in the framework of the Nambu-Jona-Lasinio model. We compute the masses of charged ρ mesons numerically as a function of the magnetic field for different values of temperature and chemical potential. The self-energy of the ρ meson contains the quark-loop contribution, i.e. the leading order contribution in 1/Nc expansion. The charged ρ meson mass decreases with the magnetic field and drops to zero at a critical magnetic field eBc, which indicates that the charged vector meson condensation, i.e. the electromagnetic superconductor can be induced above the critical magnetic field. Surprisingly, it is found that the charged ρ condensation can even survive at high temperature and density. At zero temperature, the critical magnetic field just increases slightly with the chemical potential, which indicates that charged ρ condensation might occur inside compact stars. At zero density, in the temperature range 0.2-0.5 GeV, the critical magnetic field for charged ρ condensation is in the range of 0.2-0.6 GeV2, which indicates that a high temperature electromagnetic superconductor might be created at LHC.

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