# Zero value for the three-loop. beta. function in N=4 supersymmetric Yang-Mills theory

@article{Grisaru1980ZeroVF, title={Zero value for the three-loop. beta. function in N=4 supersymmetric Yang-Mills theory}, author={M. Grisaru and M. Ro{\vc}ek and W. Siegel}, journal={Physical Review Letters}, year={1980}, volume={45}, pages={1063-1066} }

This Letter describes a calculation using superfield techniques, showing that the ..beta.. function is zero to three loops in N=4 supersymmetric Yang-Mills theory. This result gives further indication that the theory is likely to be finite and conformally invariant order by order in perturbation theory.