Vacuum structure and Casimir scaling in Yang-Mills theories

Details Vacuum structure and Casimir scaling in Yang-Mills theories Vacuum structure and Casimir scaling in Yang-Mills theories

2009-11-07

arxiv.org/abs/0911.1453v1

PoS QCD-TNT09:032,2009

Physics

High Energy Physics

High Energy Physics - Lattice

12 pages, 5 figures, 8 EPS files. Presented at International Workshop on QCD Green's Functions, Confinement and Phenomenology,

Scientific paper

The vacuum of Yang-Mills theories can be imagined as a magnetically disordered medium with domain structure, with color magnetic flux in each domain quantized in units corresponding to the gauge group center. This model leads to the prediction of Casimir scaling, i.e. the proportionality of string tensions of potentials (at intermediate distances) between color sources from higher-representations to eigenvalues of the quadratic Casimir operator. I present evidence for Casimir scaling in G(2) lattice gauge theory. I also discuss support for some ingredients of the model from the recently conjectured form of the Yang-Mills ground-state wave-functional.

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