Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective field theory and the quark model, II. Structure of loop
  corrections   We analyze the structure of meson loop corrections to the O($m_s$)
expressions for the baryon masses and magnetic moments in heavy-baryon chiral
perturbation theory (HBChPT), and show in detail how the bulk of the
corrections are absorbed into redefinitions of the unknown parameters of the
O($m_s$) chiral expansion. To effect this analysis, we use the
three-flavor-index representation of the effective baryon fields and HBChPT
developed in a preceding paper, and a decomposition of the corrections in terms
of effective one-, two-, and three-quark operators. The results show why the
loop corrections have so little effect on fits to the masses and moments, and
do not seriously disrupt the Gell-Mann--Okubo relations for the masses and the
Okubo relation for the moments even though individual loops can be quite large.
We also examine the momentum structure of the residual loop corrections, and
comment on limits on their validity in HBChPT. The structural analysis can be
generalized straightforwardly to other problems in HBChPT using the
three-flavor-index representation of the effective baryon fields, and provides
a fairly simple way to determine what parts of the loop corrections are
actually significant in a given setting.

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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: physics
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The categories of this paper are: cs
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The categories of this paper are: stat