Decay Constants of Pseudoscalar Mesons to Two Loops in Three-Flavor Partially Quenched ChPT
This paper presents a first study of the decay constants of the charged, or flavor-off-diagonal, pseudoscalar mesons to two loops for three flavors of sea quarks, in Partially Quenched Chiral Perturbation Theory (PQChPT). Explicit analytical expressions up to order p6 in the momentum expansion are given. The calculations have been performed within the supersymmetric formulation of PQChP
