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- W2159551435 abstract "The difference between the electromagnetic self-energies of proton and neutron can be calculated with the Cottingham formula, which expresses the self-energies as an integral over the electroproduction cross sections – provided the nucleon matrix elements of the current commutator do not contain a fixed pole. We show that, under the same proviso, the subtraction function occurring in the dispersive representation of the virtual Compton forward scattering amplitude is determined by the cross sections. The representation in particular leads to a parameter-free sum rule for the nucleon polarisabilities. We evaluate the sum rule for the difference between the electric polarisabilities of proton and neutron by means of the available parameterisations of the data and compare the result with experiment." @default.
- W2159551435 created "2016-06-24" @default.
- W2159551435 creator A5014733473 @default.
- W2159551435 creator A5028239227 @default.
- W2159551435 creator A5057754049 @default.
- W2159551435 creator A5076524172 @default.
- W2159551435 date "2015-08-01" @default.
- W2159551435 modified "2023-10-06" @default.
- W2159551435 title "Cottingham formula and nucleon polarisabilities" @default.
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