Issue |
Europhys. Lett.
Volume 75, Number 4, August 2006
|
|
---|---|---|
Page(s) | 555 - 561 | |
Section | Nuclear physics | |
DOI | https://doi.org/10.1209/epl/i2006-10141-6 | |
Published online | 07 July 2006 |
Four-boson scale near a Feshbach resonance
1
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
Received:
8
April
2006
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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