Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral NN model and Ay puzzle   We analyze the results by chiral NN models for the two-nucleon system and
calculate the predictions for the nucleon vector analyzing power of elastic
nucleon-deuteron (Nd) scattering, Ay, by these models. Our conclusion is that a
QUANTITATIVE chiral two-nucleon potential does not resolve the Nd Ay puzzle
(when only two-body forces are included).

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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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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: hep-th
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
6
The categories of this paper are: astro-ph
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The categories of this paper are: adap-org