Abstract
We show that the physical \( \mathcal{N} = {4} \) super Yang-Mills theory on a four-sphere with an arbitrary gauge group receives no instanton contributions, by clarifying the relation between the hypermultiplet mass and the equivariant parameters of the mass-deformed theory preserving \( \mathcal{N} = {2} \) supersymmetry. The correct relation also implies that \( \mathcal{N} = {4} \) superconformal Yang-Mills theory with gauge group SU(2) corresponds to Liouville theory on a torus with the insertion of a non-trivial operator, rather than the identity as have been claimed in the literature.
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ArXiv ePrint: 1004.1222
On leave of absence from ITEP, 117218, Moscow, Russia. (Vasily Pestun)
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Okuda, T., Pestun, V. On the instantons and the hypermultiplet mass of \( \mathcal{N} = {{2}^{ * }} \) super Yang-Mills on S 4 . J. High Energ. Phys. 2012, 17 (2012). https://doi.org/10.1007/JHEP03(2012)017
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DOI: https://doi.org/10.1007/JHEP03(2012)017