379 citations · 1.4k across the 14 of their papers we have counts for
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hep-ph1999★ 1 cited
Spectrum and Decays of Hadronic Atoms
J. Gasser, V. E. Lyubovitskij, A. Rusetsky
Using non relativistic effective Lagrangian techniques, we analyze the hadronic decay of the pi+pi- atom and the strong energy-level shift of pionic hydrogen in the ground state. W…
hep-ph1999★ 16 cited
One-channel Roy equations revisited
J. Gasser, G. Wanders
The Roy equation in the single channel case is a nonlinear, singular integral equation for the phase shift in the low-energy region. We first investigate the infinitesimal neighbor…