Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2011-07-15
Physics
High Energy Physics
High Energy Physics - Theory
13 pages,4 figures
Scientific paper
We derive a supersymmetric renormalization group (RG) equation for the scale-dependent superpotential of the supersymmetric O(N) model in three dimensions. For a supersymmetric optimized regulator function we solve the RG equation for the superpotential exactly in the large-N limit. The fixed-point solutions are classified by an exactly marginal coupling. In the weakly coupled regime there exists a unique fixed point solution, for intermediate couplings we find two separate fixed point solutions and in the strong coupling regime no globally defined fixed-point potentials exist. We determine the exact critical exponents both for the superpotential and the associated scalar potential. Finally we relate the high-temperature limit of the four-dimensional theory to the Wilson-Fisher fixed point of the purely scalar theory.
Litim Daniel F.
Mastaler Marianne C.
Synatschke-Czerwonka Franziska
Wipf Andreas
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