Color Ferromagnetism and Color Superconductivity in Dense Quark Matter

ORAL

Abstract

As we have shown, Savvidy vacuum unstable in vacuum becomes stable in dense quark matter, so that a color magnetic field is generated spontaneously. We compare the free energy of this color ferromagnetic state with the free energies of color superconducting states ( CFL and 2SC ) of dense quark matter. We find that the color ferromagnetic state is more stable than the color superconducting states in an range of baryon chemical potentials accessible in experiments or neutron stars. Although the strength of the color magnetic field is not known, the result holds for a wide range of the magnetic field strength.

–

Authors

  • Aiichi Iwazaki

    Professor, Nishogakusha University

  • Osamu Morimatsu

    KEK, Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization, Professor, KEK, Institute of Particle and Nuclear Studies, KEK

  • Tetsuo Nishikawa

    Tokyo Institute of Technology, Research Associate, Tokyo Institute of Technology, Dept. of Phys., Tokyo Institute of Technology, Dept. of Physics, Tokyo Institute of Technology

  • Munehisa Ohtani

    Radiation Laboratory, RIKEN, RIKEN, Research Associate, RIKEN