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Color superconductor with a color-sextet condensate
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SYSNO ASEP 0101858 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Color superconductor with a color-sextet condensate Title Barevný supravodič s dikvarkovým kondenzátem v barevném sextetu Author(s) Brauner, Tomáš (UJF-V) RID
Hošek, Jiří (UJF-V) ORCID, SAI
Sykora, R. (CZ)Source Title Physical Review D - ISSN 0556-2821
Roč. 68, č. 9 (2003), 094004Number of pages 1 s. Language eng - English Country CZ - Czech Republic Keywords high-density QCD ; symmetry-breaking Subject RIV BE - Theoretical Physics R&D Projects GA202/02/0847 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z1048901 - UJF-V Annotation We analyze color superconductivity of one massive flavor quark matter at moderate baryon density with a spin-zero color-sextet condensate. The most general Higgs-type ground-state expectation value of the order parameter implies complete breakdown of the SU(3)xU(1) symmetry. However, both the conventional fourth-order polynomial effective bosonic description and the Nambu-Jona-Lasinio-type fermionic description in the mean-field approximation favor an enhanced SO(3) symmetry of the ground state. We ascribe this finding to the failure of the mean-field approximation and propose that a more sophisticated technique is needed Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2005
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