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Universality in few-body Systems: from few-atoms to few-nucleons

AutorKievsky, A.; Gattobigio, M.; Garrido, Eduardo
Fecha de publicación2014
EditorInstitute of Physics Publishing
CitaciónJournal of Physics: Conference Series 527: 012001 (2014)
ResumenSome aspects of universal properties are discussed in few-atom as well as in few- nucleon systems. When the two-body scattering length a is large the three-body system presents some peculiar characteristics such as the Efimov effect. In the present contribution, the zerorange theory deduced by V. Efimov is compared to results obtained using potential models. Accordingly range corrections are introduced. These corrections appear as a shift in the variable K*a with K* the three-body parameter. The three-boson spectrum, atom-dimer scattering and the recombination rate at threshold are analyzed using the finite-range theory proposed. In the case of nuclear systems, n ¿ d scattering is discussed using the universal formula derived by Efimov. Furthermore, the spectrum up to N = 6 is discussed using the central Volkov potential. Published under licence by IOP Publishing Ltd
Descripción13 pags. ; 7 figs. ; Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.
Identificadoresdoi: 10.1088/1742-6596/527/1/012001
issn: 1742-6588
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