Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasiparticle Properties in Effective Field Theory   The quasiparticle concept is an important tool for the description of
many-body systems. We study the quasiparticle properties for dilute Fermi
systems with short-ranged, repulsive interactions using effective field theory.
We calculate the proper self-energy contributions at order (K_f/Lambda)^3,
where Lambda is the short-distance scale that sets the size of the effective
range parameters and K_f the Fermi momentum. The quasiparticle energy, width,
and effective mass to order O(K_f/Lambda)^3 are derived from the calculated
self-energy.

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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: math
1
The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin