Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nucleon-Deuteron Scattering from an Effective Field Theory   We use an effective field theory to compute low-energy nucleon-deuteron
scattering. We obtain the quartet scattering length using low energy constants
entirely determined from low-energy nucleon-nucleon scattering. We find
$a_{th}=6.33$ fm, to be compared to $a_{exp}=6.35\pm 0.02$ fm.

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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys