Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lattice computation of the nucleon scalar quark contents at the physical
  point   We present a QCD calculation of the $u$, $d$ and $s$ scalar quark contents of
nucleons based on $47$ lattice ensembles with $N_f = 2+1$ dynamical sea quarks,
$5$ lattice spacings down to $0.054\,\text{fm}$, lattice sizes up to
$6\,\text{fm}$ and pion masses down to $120\,\text{MeV}$. Using the
Feynman-Hellmann theorem, we obtain $f^N_{ud} = 0.0405(40)(35)$ and $f^N_s =
0.113(45)(40)$, which translates into $\sigma_{\pi N}=38(3)(3)\,\text{MeV}$,
$\sigma_{sN}=105(41)(37)\,\text{MeV}$ and $y_N=0.20(8)(8)$ for the sigma terms
and the related ratio, where the first errors are statistical and the second
are systematic. Using isospin relations, we also compute the individual up and
down quark contents of the proton and neutron (results in the main text).

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The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th