Two-point correlators in non-conformal N = 2 gauge theories

We study the two-point correlation functions of chiral/anti-chiral operators in N = 2 supersymmetric Yang-Mills theories on R4 with gauge group SU(N) and Nf massless hypermultiplets in the fundamental representation. We compute them in perturbation theory, using dimensional regularization up to two loops, and show that fieeld-theory observables built out of dimensionless ratios of two-point renormalized correlators on R4 are in perfect agreement with the same quantities computed using localization on the four-sphere, even in the non-conformal case Nf different from 2N.