Isospin breaking at two loops in three-flavour Chiral Perturbation Theory
In this thesis, we first give an introduction to the framework of Chiral Perturbation Theory. Following this, we proceed to conduct a detailed two-loop order calculation within Chiral Perturbation Theory, aimed at analyzing pseudoscalar meson masses and decay constants while incorporating isospin breaking effects. Our calculations account for both quark mass and charge isospin breaking effects in
