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

Journal Article · Thu Feb 15 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.045005· OSTI ID:21011098

Ebert, D ^[1]; Klimenko, K G ^[2]

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1. Institut fuer Physik, Humboldt-Universitaet zu Berlin, 12489 Berlin (Germany)
2. Institute for High Energy Physics, 142281, Protvino, Moscow Region (Russian Federation)

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 {mu}. We investigate the effective action of meson and diquark fields at sufficiently high values of {mu}, 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){sub B} baryon symmetry in the CFL phase. Finally, the existence of massive scalar and pseudoscalar diquark excitations is demonstrated.

• OSTI ID: 21011098
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACTION INTEGRAL
BARYONS
COLOR MODEL
EXCITATION
FLAVOR MODEL
MESONS
POTENTIALS
QUARK MATTER
QUARKS
SCALARS
SYMMETRY
SYMMETRY BREAKING
U-1 GROUPS