A diagrammatic derivation of the meson effective masses in the neutral color-flavor-locked phase of quantum chromodynamics

2007/05/31 by Marco Ruggieri
Physics and Astronomy · #Condensation #Diagrammatic reasoning #High-Energy Particle Collisions Research #Meson #Particle physics #Particle physics theoretical and experimental studies #Phase (matter) #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Thermodynamics #hep-ph

paper · pdf · doi:10.1088/1126-6708/2007/07/031

published as JHEP 0707:031,2007 · 10 pages, 2 figures, RevTeX4 style. Version accepted for publication on JHEP. Some minor change in the text

arxiv created 2007/07/08 · openalex publication_date 2007/07/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We offer a diagrammatic derivation of the effective masses of the axial flavor excitations in the electrical and color neutral CFL phase of QCD. In particular we concentrate on the excitations with the quantum numbers of the kaons: we show how their effective chemical potentials, responsible of their Bose-Einstein condensation and found previously on the basis of pure symmetry arguments, arise at the microscopic level by loop effects. We perform also the numerical evaluation of the relevant loops in the whole CFL regime M_s²/2μΔ\leqslant 1, showing the existence of the enhancement of the kaon condensation with respect to the lowest order result. Finally we discuss the role of electrical and color neutrality in the microscopic calculation.

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