Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-precision covariant one-boson-exchange potentials for np scattering
  below 350 MeV   Using the Covariant Spectator Theory (CST), we have found One-Boson-Exchange
(OBE) potentials that fit the 2006 world np data below 350 MeV with a
\chi^2/N_data very close to 1, for a total of 3788 data. Our potentials have
significantly fewer adjustable parameters than previous high-precision
potentials, and they also reproduce the experimental triton binding energy
without introducing additional irreducible three-nucleon forces.

36
The categories of this paper are: cmp-lg
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The categories of this paper are: eess
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
18
The categories of this paper are: econ
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The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat