https://doi.org/10.1140/epja/i2009-10832-4
Regular Article - Theoretical Physics
Color-symmetric superconductivity in a phenomenological QCD model
1
Department of Physics, Danish Technical University, B.307, DK-2800, Lyngby, Denmark
2
CFC, Departamento de Física, Universidade de Coimbra, P-3004-516, Coimbra, Portugal
* e-mail: providencia@teor.fis.uc.pt
Received:
17
April
2009
Revised:
15
May
2009
Accepted:
15
June
2009
Published online:
12
July
2009
In this paper, we construct a theory of the NJL type where superconductivity is present, and yet the superconducting state remains, in the average, color symmetric. This shows that the present approach to color superconductivity is consistent with color singletness. Indeed, quarks are free in the deconfined phase, but the deconfined phase itself is believed to be a color singlet. The usual description of the color superconducting state violates color singletness. On the other hand, the color superconducting state here proposed is color symmetric in the sense that an arbitrary color rotation leads to an equivalent state, with precisely the same physical properties.
PACS: 12.39.Ki Relativistic quark model – / 12.39.Fe Chiral Lagrangians –
© SIF, Springer-Verlag Berlin Heidelberg, 2009
