Diquarks in the color-flavor locked phase of dense quark matter

2006/11/30 by Д. Эберт, D. Ebert, K. G. Klimenko +1 · 2 citations
Physics and Astronomy · #Baryon #Boson #Cold Atom Physics and Bose-Einstein Condensates #Diquark #High-Energy Particle Collisions Research #Massless particle #Meson #Particle physics #Physics #Pseudoscalar #Pseudoscalar meson #Quantum Chromodynamics and Particle Interactions #Quark #Scalar (mathematics) #Strange matter #hep-ph

paper · pdf · doi:10.1103/physrevd.75.045005

published as Phys.Rev.D75:045005,2007 · 10 pages, 2 figures; version accepted for publication in PRD

arxiv created 2007/01/23 · openalex publication_date 2007/02/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Diquark excitations of dense quark matter are considered in the framework of the Nambu--Jona-Lasinio model with three types of massless quarks in the presence of a quark number chemical potential \ensuremathμ. We investigate the effective action of meson and diquark fields at sufficiently high values of \ensuremathμ, where the color-flavor locked (CFL) phase is realized, and prove the existence of NG bosons in the sector of pseudoscalar diquarks. In the sector of scalar diquarks an additional NG boson is found, corresponding to the spontaneous breaking of the U(1)_B baryon symmetry in the CFL phase. Finally, the existence of massive scalar and pseudoscalar diquark excitations is demonstrated.

Citations

• Manifestation of instabilities in Nambu–Jona-Lasinio type models
• Mesons and diquarks in neutral color superconducting quark matter withβequilibrium
• Kaon condensation and Goldstone's theorem

Cited by

• Mass spectrum of diquarks and mesons in the color–flavor locked phase of dense quark matter
• Pseudoscalar bosonic excitations in the color-flavor locked phase at moderate densities