Decay Constants of Pseudoscalar Mesons to Two Loops in Three-Flavor Partially Quenched
Abstract
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 (PQ). Explicit analytical expressions up to O(p6) in the momentum expansion are given. The calculations have been performed within the supersymmetric formulation of PQ. We also present some numerical results to indicate the size of the corrections.
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