Spectrum of confining strings in SU(N) gauge theories

Details Spectrum of confining strings in SU(N) gauge theories Spectrum of confining strings in SU(N) gauge theories

2001-11-10

arxiv.org/abs/hep-th/0111090v3

JHEP 0201 (2002) 009

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 34 pages, 10 figures. Results of new SU(4) simulations added. The new data are included in the analysis, leading to imp

Scientific paper

10.1088/1126-6708/2002/01/009

We study the spectrum of the confining strings in four-dimensional SU(N) gauge theories. We compute, for the SU(4) and SU(6) gauge theories formulated on a lattice, the string tensions sigma_k related to sources with Z_N charge k, using Monte Carlo simulations. Our results are consistent with the sine formula sigma_k/sigma = sin k pi/N / sin pi/N for the ratio between sigma_k and the standard string tension sigma. For the SU(4) and SU(6) cases the accuracy is approximately 1% and 2%, respectively. The sine formula is known to emerge in various realizations of supersymmetric SU(N) gauge theories. On the other hand, our results show deviations from Casimir scaling. We also discuss an analogous behavior exhibited by two-dimensional SU(N) x SU(N) chiral models.

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