760 citations · 1.8k across the 24 of their papers we have counts for
3 papers · 1 filter
Hadronic atoms in QCD + QED
J. Gasser, V. E. Lyubovitskij, A. Rusetsky
We review the theory of hadronic atoms in QCD + QED, based on a non-relativistic effective Lagrangian framework. We first provide an introduction to the theory, and then describe s…
Cusps in K_L --> 3 pi decays
M. Bissegger, A. Fuhrer, J. Gasser +2
The pion mass difference generates a pronounced cusp in K --> 3 pi decays, the strength of which is related to the pi pi S-wave scattering lengths. We apply an effective field theo…
Integrating out strange quarks in ChPT
Jurg Gasser, Christoph Haefeli, Mikhail A. Ivanov +1
We study three flavour chiral perturbation theory in a limit where the strange quark mass is much larger than the external momenta and the up and down quark masses, and where the e…