Neutron-C-19 scattering near an Efimov state
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Data
2008-12-04
Autores
Yamashita, Marcelo Takeshi [UNESP]
Frederico, T.
Tomio, Lauro [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
The low-energy neutron-C-19 scattering in a neutron-neutron-core model is studied with large scattering lengths near the conditions for the appearance of an Efimov state. We show that the real part of the elastic s-wave phase-shift (delta(R)(0)) presents a zero, or a pole in kcot delta(R)(0). when the system has an Efimov excited or virtual state. More precisely the pole scales with the energy of the Efimov state (bound or virtual). We perform calculations in the limit of large scattering lengths, disregarding the interaction range, within a renormalized zero-range approach using subtracted equations. It is also presented a brief discussion of these findings in the context of ultracold atom physics with tunable scattering lengths. (C) 2008 Elsevier B.V. All rights reserved.
Descrição
Palavras-chave
Scattering theory, Bound states, Faddeev equation, Few-body
Como citar
Physics Letters B. Amsterdam: Elsevier B.V., v. 670, n. 1, p. 49-54, 2008.