A possibility of quark spin polarized phase in high density quark matter

Abstract

It is shown that the quark spin polarization may occur for each quark flavor by the use of the Nambu-Jona-Lasinio model with a tensor-type four-point interaction between quarks, while the two-flavor color superconducting phase in two-flavor case may be realized at high density quark matter.

Comments: 3 pages, 1 figure, invited talk given in a bilateral meeting "Quarks and Compact Stars" held in the Kavli Institute for Astronomy and Astrophysics at Peking University from Oct. 20 to 22, 2014