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arXiv · hep-ph/0611385

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

D. Ebert·K. G. Klimenko
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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 presense of a quark number chemical potential $μ$. We investigate the effective action of meson- and diquark fields at sufficiently high values of $μ$, 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.

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D. Ebert, K. G. Klimenko. 2007-01-23. Diquarks in the color--flavor locked phase of dense quark matter. https://doi.org/10.1103/physrevd.75.045005

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