Il Nuovo Cimento (1955-1965)

, Volume 13, Issue 5, pp 891–908 | Cite as

Application of the Chew-Low formalism of multi-channel reactions

  • B. W. Lee
  • A. Klein


The Low equation for a non-relativistic scattering process is investigated, using a model in which the scattering source can exist in more than one state, and the «average» interaction between the source and the particle is factorizable. The branching ratio theorem and the optical theorem are derived directly from the Low equation. The Low equation is solved by the method of Castellejo, Dalitz and Dyson, and the unique solution is determined by investigating the spectrum of the unperturbed Hamiltonian. The resonance phenomena are studied and the Breit-Wigner resonance formula is derived utilizing the properties of the generalizedR-function. The more general applicability of the method is indicated.


Si esamina l’equazione di Low per un processo di scattering non relativistico servendosi di un modello in cui la sorgente di scattering può esistere in più di uno stato, e l’interazione «media» tra la sorgente e la particella è fattorizzabile. Il teorema della branching ratio e il teorema ottico si derivano direttamente dall’equazione di Low. Si risolve l’equazione di Low col metodo di Castillejo, Dalitz e Dyson e si determina la soluzione unica esaminando lo spettro dell’hamiltoniana imperturbata. Si studiano i fenomeni di risonanza e la formula della risonanza di Breit-Wigner si deriva utilizzando le proprietà della funzioneR generalizzata. Si indica la più generale applicabilità del metodo.


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Copyright information

© Società Italiana di Fisica 1959

Authors and Affiliations

  • B. W. Lee
    • 1
  • A. Klein
    • 1
  1. 1.University of PennsylvaniaPhiladelphia

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