Condition for gapless color-antitriplet excitations in Nambu-Jona-Lasinio models

Sandin F., Oztas A. M.

PHYSICAL REVIEW C, cilt.73, 2006 (SCI İndekslerine Giren Dergi) identifier identifier


We present an exact condition for the existence of gapless quasiparticle excitations in Nambu-Jona-Lasinio models of color superconducting quark matter with a quark-quark interaction in the scalar color-antitriplet channel. The condition can be represented by a rotated ellipse in the plane of mass and chemical potential differences for the paired quark fields.