( N ) gauge theories
نویسندگان
چکیده
We study the one–loop renormalization of noncommutative U (N) gauge theories without matter. We find that for N > 1 the renormalization of the four-point function requires a counterterm which is not present in ordinary gauge theories and breaks the noncommutative gauge invariance. This counterterm is reminiscent of a nonplanar contribution in string theory.
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