Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A tale of two skyrmions: the nucleon's strange quark content in
  different large N_c limits   The nucleon's strange quark content comes from closed quark loops, and hence
should vanish at leading order in the traditional large $N_c$ (TLNC) limit.
Quark loops are not suppressed in the recently proposed orientifold large $N_c$
(OLNC) limit, and thus the strange quark content should be non-vanishing at
leading order. The Skyrme model is supposed to encode the large $N_c$ behavior
of baryons, and can be formulated for both of these large $N_c$ limits. There
is an apparent paradox associated with the large $N_c$ behavior of strange
quark matrix elements in the Skyrme model. The model only distinguishes between
the two large $N_c$ limits via the $N_c$ scaling of the couplings and the
Witten-Wess-Zumino term, so that a vanishing leading order strange matrix
element in the TLNC limit implies that it also vanishes at leading order in the
OLNC limit, contrary to the expectations based on the
suppression/non-suppression of quark loops. The resolution of this paradox is
that the Skyrme model does not include the most general type of meson-meson
interaction and, in fact, contains no meson-meson interactions which vanish for
the TLNC limit but not the OLNC. The inclusion of such terms in the model
yields the expected scaling for strange quark matrix elements.

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The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
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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: adap-org
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The categories of this paper are: econ
25
The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an