Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The three-body parameter for Efimov states in lithium-6   We present a state-of-the-art reanalysis of experimental results on Efimov
resonances in the three-fermion system of $^6$Li. We discuss different
definitions of the 3-body parameter (3BP) for Efimov states, and adopt a
definition that excludes effects due to deviations from universal scaling for
low-lying states. We develop a finite-temperature model for the case of three
distinguishable fermions and apply it to the excited-state Efimov resonance to
obtain the most accurate determination to date of the 3BP in an atomic
three-body system. Our analysis of ground-state Efimov resonances in the same
system yields values for the three-body parameter that are consistent with the
excited-state result. Recent work has suggested that the reduced 3BP for atomic
systems is a near-universal quantity, almost independent of the particular atom
involved. However, the value of the 3BP obtained for $^6$Li is significantly
($\sim 20$%) different from that previously obtained from the excited-state
resonance in Cs. The difference between these values poses a challenge for
theory.

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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex