Screening masses in neutral two-flavor color superconductor

Abstract

The Debye and Meissner screening masses of the gluons and the photon in neutral and beta-equilibrated dense two-flavor quark matter are calculated. The results are presented in a general form that can be used in gapped as well as gapless color superconducting phases. The results for the magnetic screening masses indicate that the system develops a chromomagnetic instability. Possible consequences of the instability are discussed.

Comments: 29 pages, 2 figures. Minor corrections. References added. Version accepted to Phys. Rev. D