Global Strings in High Density QCD

Abstract

We show that several types of global strings occur in colour superconducting quark matter due to the spontaneous violation of relevant U(1) symmetries. These include the baryon U(1)_B, and approximate axial U(1)_A symmetries as well as an approximate U(1)_S arising from kaon condensation. We discuss some general properties of these strings and their interactions. In particular, we demonstrate that the U(1)_A strings behave as superconducting strings. We draw some parallels between these strings and global cosmological strings and discuss some possible implications of these strings to the physics in neutron star cores.

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References in corpus (9)

• The Condensed Matter Physics of QCD
• High Density Quark Matter under Stress
• QCD at finite isospin density: from pion to quark-antiquark condensation
• Kaon Condensation and Goldstone's Theorem
• Domain walls of high-density QCD
• Photon Self-Energy in a Color Superconductor
• Instanton interactions in dense-matter QCD
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