The Pseudoscalar Meson Mass to Two Loops in Three-Flavor Partially Quenched $\chi$PT

Johan Bijnens, Niclas Danielsson, Timo A. Lahde

This paper presents a first study of the pseudoscalar meson masses to two loops, or NNLO, within the supersymmetric formulation of partially quenched chiral perturbation theory (PQ…