Interplay between Spin Polarization and Color Superconductivity in High   Density Quark Matter
  Here, it is suggested that a four-point interaction of the tensor type may lead to spin polarization in quark matter at high density. It is found that the two-flavor superconducting phase and the spin polarized phase correspond to distinct local minima of a certain generalized thermodynamical potential. It follows that the transition from one to the other phase occurs passing through true minima with both a spin polarization and a color superconducting gap. It is shown that the quark spin polarized phase is realized at rather high density, while the two-flavor color superconducting phase is realized at a lower density region. 
Y.Tsue (Univ. de Coimbra, Portugal and Kochi Univ., Japan), J.da   Providencia (Univ. de Coimbra, Portugal), C.Providencia (...
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