Abstrak

We propose a novel renormalization scheme for the hadronic operators. The renormalization factor of the operator in this scheme is normalized by the correlation function at tree level in coordinate space. If we focus on the pseudo scalar operator, then its renormalization factor is related to the mass renormalization factor of the fermion through the partially conserved axialvector current relation. Using the renormalization factor for the pseudo scalar operator in our scheme,we obtain the mass anomalous dimension of the SU(3) gauge theory coupled to N f = 12 massless fundamental fermions, which has an infrared fixed point (IRFP). The mass anomalous dimension at the IRFP is estimated as γ ∗m= 0.044+0.025−0.024(stat.)+0.057 −0.032(syst.).