Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flavor decomposition of the pion-nucleon $\sigma$-term   We re-analyze the flavor decomposition of the pion-nucleon $\sigma$-term in
the framework of baryon chiral perturbation to fourth order. We employ a
covariant and the heavy baryon framework including also the low-lying decuplet.
Using only continuum data, we find a small strangeness content of the proton.
The uncertainties are, however, large and might be overcome by dedicated
lattice QCD calculations.

15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph