Volume 75, Number 4, August 2006
|Page(s)||555 - 561|
|Published online||07 July 2006|
Four-boson scale near a Feshbach resonance
Universidade Estadual Paulista - 18409-010, Itapeva, SP, Brazil
2 Instituto de Física Teórica, Universidade Estadual Paulista 01405-900, São Paulo, SP, Brazil
3 Instituto de Física, Universidade Federal Fluminense 24210-900, Niterói, RJ, Brazil
4 Departamento de Física, Instituto Tecnológico de Aeronáutica Centro Técnico Aeroespacial - 12228-900 São José dos Campos, SP, Brazil
Accepted: 20 June 2006
We show that an independent four-body momentum scale drives the tetramer binding energy for fixed trimer energy (or three-body scale ) and large scattering length (a). The three- and four-body forces from the one-channel reduction of the atomic interaction near a Feshbach resonance disentangle and . The four-body independent scale is also manifested through a family of Tjon lines, with slope given by for . There is the possibility of a new renormalization group limit cycle due to the new scale.
PACS: 21.45.+v – Few-body systems / 36.40.-c – Atomic and molecular clusters / 05.10.Cc – Renormalization group methods
© EDP Sciences, 2006
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