Sum rules in the CFL phase of QCD at finite density

2000/10/27 by Cristina Manuel, Michel H. G. Tytgat, Michel H.G. Tytgat · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th

paper · pdf · doi:10.1016/s0370-2693(01)00126-5

published as Phys.Lett. B501 (2001) 200-208 · 13 pages, revtex, using epsfig. Typo in reference corrected

arxiv created 2000/10/27 · openalex publication_date 2001/03/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We study the asymmetry between the vector current and axial-vector current correlators in the colour-flavour locking (CFL) phase of QCD at finite density. Using Weinberg's sum rules, we compute the decay constant f_π of the Goldstone modes and find agreement with previous derivations. Using Das's sum rule, we also estimate the contribution of electromagnetic interactions to the mass of the charged modes. Finally, we comment on low temperature corrections to the effective field theory describing the Goldstone bosons.

Citations

• Debye screening and the Meissner effect in a three-flavor color superconductor
• QCD at finite baryon density: nucleon droplets and color superconductivity
• Chiral perturbation theory: Expansions in the mass of the strange quark

Cited by

• Photon self-energy in a color superconductor