Spontaneous superfluid current generation in the kaon condensed color flavor locked phase at nonzero strange quark mass
Andrei Kryjevski

We find that for a large enough strange quark mass, $m_s^2/4\,\mu\,\Delta&gt2/3(1-0.023)$ ($\mu$ is the quark number chemical potential, $\Delta$ is the superconducting gap), the kaon condensed CFL phase of asymptotically dense strongly interacting 3 flavor quark matter is unstable with respect to spontaneous generation of currents of Nambu Goldstone bosons due to spontaneous breaking of baryon number symmetry and hypercharge symmetry in the CFL$K^0$ ground state. The total baryon and hypercharge currents vanish in the ground state. We find that CFL$K^0$ and the new state are separated by a first order phase transition. The result is derived in the mean field approximation of High Density Effective Theory with electromagnetic interactions turned off.

© 2008 The American Physical Society.