Spectrum of confining strings in SU(N) gauge theories
نویسندگان
چکیده
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 σk related to sources with ZN charge k, using Monte Carlo simulations. Our results are consistent with the sine formula σk/σ = sin k π N / sin π N for the ratio between σk and the standard string tension σ. 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) × SU(N) chiral models.
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تاریخ انتشار 2001