Scaling Analysis of Improved Actions for Pure SU(3) Gauge Theory
  We have explored the behaviour of some improved actions based on a nonperturbative renormalization group (RG) analysis in coupling space. We calculate the RG flow in two-coupling space $(\boneone,\bonetwo)$ and examine the restoration of rotational invariance and the scaling of physical quantities $(T_c/\sqrt{\sigma})$. 
QCD-TARO : Ph. de Forcrand, M. Garc\'ia Per\'ez, T. Hashimoto, S.   Hioki, H. Matsufuru, O. Miyamura, A. Nakamura, I.-O Stam...