Abstract
I give an introduction to color superconductivity in cold, dense quark matter. I focus in particular on how the solution to the gap equation is qualitatively different in ordinary BCS theory with local four-fermion interactions, in theories with non-local, but screened boson exchange, and in QCD, where magnetic gluon exchange is not screened at zero temperature. I argue that a reliable computation of the gap parameter requires knowledge of the gluon self-energy in a color superconductor. As a first step to determine the gluon self-energy, I report calculations of the Debye and Meissner masses in two- and three-flavor color superconductors.
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Rischke, D.H. Properties of gluons in color superconductors. APH N.S., Heavy Ion Physics 14, 329–340 (2001). https://doi.org/10.1556/APH.14.2001.1-4.31
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DOI: https://doi.org/10.1556/APH.14.2001.1-4.31