N_f=2 chiral dynamics in the mixed chiral regime

Abstract

We present a study of the pseudoscalar propagator in the mixed chiral regime with valence quark masses in the \epsilon-regime and sea quark masses in the p-regime. We first show the NNLO prediction of this observable in the chiral expansion. In sectors of fixed topology, the correlator has a pole in 1/m_v^2 that can be matched to the topological zero-mode contributions to the correlator. We compute the residue of this pole in a N_f=2 mixed-action simulation and compare the results with the prediction in Chiral Perturbation Theory.

Comments: 7 pages, 4 figures, 3 tables, talk presented at the 30th International Symposium on Lattice Field Theory (Lattice 2012), Cairns, Australia, June 24-29, 2012