The locality of the fourth root of staggered fermion determinant in the   interacting case
  The fourth root approximation in LQCD simulations with dynamical staggered fermions requires justification. We test its validity numerically in the interacting theory in a renormalization group framework. 
C. Bernard (1), C. DeTar (2), Steven Gottlieb (3), U. Heller (4), J.E.   Hetrick (5), L. Levkova (3), F. Maresca (2), D. Ren...