18 citations · 18 across the 1 of their papers we have counts for
4 papers
The expansion by regions in pi K scattering
Roland Kaiser, Julia Schweizer
We discuss a number of two loop (vertex) integrals relevant for pi K scattering at threshold. As such these are functions of two well separated mass scales, M\_pi/M\_K << 1. The me…
Spectrum and decays of hadronic atoms
J. Schweizer
We describe the spectra and decays of pi pi and pi K atoms within a non-relativistic effective field theory. The evaluations of the energy shifts and widths are performed at next-t…
Decay widths and energy shifts of pi pi and pi K atoms
J. Schweizer
We calculate the S-wave decay widths and energy shifts for pi pi and pi K atoms in the framework of QCD+QED. The evaluation - valid at next-to-leading order in isospin symmetry bre…
Explicit generating functional for pions and virtual photons
J. Schweizer
We construct the explicit one-loop functional of chiral perturbation theory for two light flavours, including virtual photons. We stick to contributions where 1 or 2 mesons and at…