379 citations · 1.4k across the 14 of their papers we have counts for
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hep-ph2020★ 20 cited
Sum rule for the Compton amplitude and implications for the proton-neutron mass difference
J. Gasser, H. Leutwyler, A. Rusetsky
The Cottingham formula expresses the leading contribution of the electromagnetic interaction to the proton-neutron mass difference as an integral over the forward Compton amplitude…
hep-ph2020★ 32 cited
On the mass difference between proton and neutron
J. Gasser, H. Leutwyler, A. Rusetsky
The Cottingham formula expresses the electromagnetic part of the mass of a particle in terms of the virtual Compton scattering amplitude. At large photon momenta, this amplitude is…