Polarizability sum rules in QED |
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Authors: | E. Llanta R. Tarrach |
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Affiliation: | Departamento de Física Teórica, Universidad de Barcelona, Spain |
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Abstract: | The well founded total photoproduction and the, assumed substraction free, longitudinal photoproduction polarizability sum rules are checked in QED at the lowest non-trivial order. The first one is shown to hold, whereas the second one turns out to need a subtraction, which makes its usefulness for determining the electromagnetic polarizabilities of the nucleons quite doubtful. |
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