Faddeev-Niemi conjecture and effective action of QCD
May, 2001
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Abstract:
We calculate a one loop effective action of SU(2) QCD in the presence of the monopole background, and find a possible connection between the resulting QCD effective action and a generalized Skyrme-Faddeev action of the non-linear sigma model. The result is obtained using the gauge-independent decomposotion of the gauge potential into the topological degrees which describes the non-Abelian monopoles and the local dynamical degrees of the potential, and integrating out all the dynamical degrees of QCD.- 12.38.-t
- 11.15.-q
- 12.38.Aw
- 11.10.Lm
- gauge field theory: SU(2)
- effective action
- monopole: background field
- sigma model: nonlinear
- infrared problem
- causality
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