Trouble with space-like noncommutative field theory
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It is argued that the one-loop effective action for a space-like noncommutative scalar field theory does not exist. This indicates that such theories are not renormalizable already at one loop order and suggests supersymmetrization and reinvestigating other types of noncommutativity.
1+7 pages. v2: two references added
1+7 pages. v2: two references added