Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Holographic QCD and Excited Baryons from String Theory   We study baryons of arbitrary isospin in a stringy holographic QCD model. In
this D4-D8 holographic setting, the flavor symmetry is promoted to a gauge
symmetry in the bulk, and produces, as KK modes of the gauge field, pions and
spin one mesons of low energy QCD. Baryons of arbitrary isospins are
represented as instanton solitons with isospin and spin quantum numbers locked,
in a manner similar to the Skyrmion model. The soliton picture leads to a
natural effective field theory of arbitrary baryons interacting with mesons.
Couplings of baryons to axial mesons, including pions, are dominated in the
large $N_c$ limit by a direct coupling to the flavor field strength in five
dimensions. We delineate the relevant couplings and determine their strengths.
This work generalizes part of hep-th/0701276 and arXiv:0705.2632 [hep-th] to
all excited baryons. Due to technical difficulties in introducing relativistic
higher spin fields, we perform all computations in the nonrelativistic regime,
which suffices for the leading $N_c$ predictions.

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The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
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The categories of this paper are: physics
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: patt-sol