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Finite energy sum rules and innite sequences of daughter trajectories

Research output: Contribution to Journal/MagazineJournal articlepeer-review

<mark>Journal publication date</mark>23/06/1969
<mark>Journal</mark>Physical review letters
Issue number25
Number of pages3
Pages (from-to)1411-1413
Publication StatusPublished
<mark>Original language</mark>English


It is shown that an infinite set of daughter trajectories is required to saturate finite-energy sum rules consistently. In the presence of this infinite set, the sum rules by themselves do not constrain the energy dependence of the trajectory function.