Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hidden Structure in a Lagrangian for Hyperfine Splitting of the Heavy
  Baryons   We investigate the hyperfine splitting of the heavy baryons in the
bound-state approach. We start with an ordinary relativistic Lagrangian which
has been extensively used to discuss finite mass corrections to the heavy limit
predictions. It turns out that the dominant contribution arises from terms
which do not manifestly break the heavy spin symmetry. The actual heavy spin
violating terms are uncovered by carefully performing a 1/M expansion of this
Lagrangian.

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The categories of this paper are: atom-ph
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The categories of this paper are: cs
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The categories of this paper are: q-alg
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The categories of this paper are: econ
16
The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin