Abstract
The Gaussian effective potential for (λφ4)4 theory indicates that two distinct, non-trivial, theories may exist. In the context of dimensional regularization these can be understood as thed→4 limits of two separate theories inhabitingd≧4 andd≦4 dimensions, respectively.
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Stevenson, P.M. Dimensional continuation and the twoλφ 4)4 theories. Z. Phys. C - Particles and Fields 35, 467–470 (1987). https://doi.org/10.1007/BF01596898
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DOI: https://doi.org/10.1007/BF01596898