Journal
PHYSICAL REVIEW A
Volume 97, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.97.012701
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [308486/2015-3, 302075/2016-0, 306191-2014-8]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [2017/05660-0, 2016/01816-2]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior [8888.1.030363/2013-01]
- Senior visitor program in ITA-DCTA
- National Science Foundation [NSF-HRD-1436702]
- Central State University
- Institute of Nuclear and Particle Physics at Ohio University
- Spanish Ministerio de Economia y Competitividad [FIS2014-51971-P]
- Consejo Superior de Investigaciones Cientificas [i-LINK 1056]
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The discrete Efimov scaling behavior, well known in the low-energy spectrum of three-body bound systems for large scattering lengths (unitary limit), is identified in the energy dependence of an atom-molecule elastic cross section in mass-imbalanced systems. That happens in the collision of a heavy atom with mass m(H) with a weakly bound dimer formed by the heavy atom and a lighter one with mass m(L) << m(H). Approaching the heavy-light unitary limit, the s-wave elastic cross section sigma will present a sequence of zeros or minima at collision energies following closely the Efimov geometrical law. Our results, obtained with Faddeev calculations and supplemented by a Born-Oppenheimer analysis, open a perspective to detecting the discrete scaling behavior from low-energy scattering data, which is timely in view of the ongoing experiments with ultracold binary mixtures having strong mass asymmetries, such as lithium and cesium or lithium and ytterbium.
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