Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nucleon form factors and couplings with $N_\mathrm{f} = 2 + 1$ Wilson
  fermions   We present updated results on the nucleon electromagnetic form factors and
axial coupling calculated using CLS ensembles with $N_\mathrm{f}=2+1$ dynamical
flavours of Wilson fermions. The measurements are performed on large, fine
lattices with a pseudoscalar mass reaching down to 200 MeV. The
truncated-solver method is employed to reduce the variance of the measurements.
Estimation of the matrix elements is challenging due to large contamination
from excited states and further investigation is necessary to bring these
effects under control.

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The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: cond-mat
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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: quant-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci