Level rearrangement in three-body systems

Abstract : We study systems of three bosons bound by a long-range interaction supplemented by a short-range potential of variable strength. This generalizes the usual two-body exotic atoms where the Coulomb interaction is modified by nuclear forces at short distances. The energy shift due to the short-range part of the interaction combines two-body terms similar to the ones entering the Trueman-Deser formula, and three-body contributions. A phenomenon of level rearrangement is observed, similar to the Zel'dovich effect, by the onset of an additional stable level which is eventually absorbed by the two-body threshold energy, and can be interpreted as an Efimov-like state of the short-range potential.
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Soumis le : vendredi 30 septembre 2016 - 07:21:25
Dernière modification le : mardi 27 mars 2018 - 15:43:29

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J.-M. Richard, C. Fayard. Level rearrangement in three-body systems. Physics Letters A, Elsevier, 2017, 381, pp.3217-3221. 〈10.1016/j.physleta.2017.08.021〉. 〈in2p3-01374204〉

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