Two-point functions at two loops in three flavour chiral perturbation theory Original Research Article

The vector and axial-vector two-point functions are calculated to next-to-next-to-leading order in Chiral Perturbation Theory for three light flavours. We also obtain expressions at the same order for the masses, mπ2, mK2 and mη2, and the decay constants, Fπ, FK and Fη. We present some numerical results after a simple resonance estimate of some of the new O(p6) constants.