Electromagnetic proton-neutron mass difference

Abstract

We discuss the Cottingham formula and evaluate the proton-neutron electromagnetic mass difference exploiting the state-of-the-art phenomenological input. We decompose individual contributions to the mass splitting into Born, inelastic and subtraction terms. We evaluate the subtraction-function contribution from the experimental input only and the Born term accounting for the modern low-$Q^2$ data.

5 pages, 3 figures, journal version

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Cited by in corpus (5)

• On the mass difference between proton and neutron
• Sum rule for the Compton amplitude and implications for the proton-neutron mass difference
• Finite volume corrections to forward Compton scattering off the nucleon
• Lattice QCD calculation of the Compton amplitude subtraction function
• Analyticity and Regge asymptotics in virtual Compton scattering on the nucleon