Analytic representation of FK /Fπ in two loop chiral perturbation theory
Summary, in English
We present an analytic representation of FK/Fπ as calculated in three-flavor two-loop chiral perturbation theory, which involves expressing three mass scale sunsets in terms of Kampé de Fériet series. We demonstrate how approximations may be made to obtain relatively compact analytic representations. An illustrative set of fits using lattice data is also presented, which shows good agreement with existing fits.
- Subatomic Physics
- ISSN: 2470-0010