Spectral density of the QCD Dirac operator at the NLO in chiral perturbation theory

We compute the spectral density of the QCD Dirac operator by using partially quenched chiral perturbation theory (PQChPT) at the next-to-leading order (NLO). We focus on the theory with two degenerate dynamical flavors supplemented with an additional quenched one. The definition of the partially quenched (PQ) chiral theory and the computational strategy adopted here are slightly different from those that can be found in the literature [1, 2]. The spectral density is extracted from the analytic continuation of the PQ chiral condensate following Refs. [3, 4], where some of the results obtained here can be found.