Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of interaction energy near a Feshbach resonance in a 6Li
  Fermi gas   We investigate the strongly interacting regime in an optically trapped $^6$Li
Fermi mixture near a Feshbach resonance. The resonance is found at $800(40) $G
in good agreement with theory. Anisotropic expansion of the gas is interpreted
by collisional hydrodynamics. We observe an unexpected and large shift ($80 $G)
between the resonance peak and both the maximum of atom loss and the change of
sign of the interaction energy.

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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th