Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gold-plated moments of nucleon structure functions in baryon chiral
  perturbation theory   We obtain leading- and next-to-leading order predictions of chiral
perturbation theory for several prominent moments of nucleon structure
functions. These free-parameter free results turn out to be in overall
agreement with the available empirical information on nearly all of the
considered moments, in the region of low-momentum transfer ($Q^2 < 0.3$
GeV$^2$). Especially surprising is the situation for the spin polarizability
$\delta_{LT}$, which thus far was not reproducible in chiral perturbation
theory for proton and neutron simultaneously. This problem, known as the
"$\delta_{LT}$ puzzle," is not seen in the present calculation.

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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
18
The categories of this paper are: econ