SU(N) gauge theories for all N
Abstract
We show that SU(N) gauge theories in 2+1 dimensions are close to N=∞ for N ≥ 2. The dimensionful coupling, g2, is proportional to 1/N, at large N, confirming the usual diagram-based expectation. Preliminary calculations in 3+1 dimensions indicate that the same is true there.
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