Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical coupled-channel approach to hadronic and electromagnetic
  production of kaon-hyperon on the proton   A dynamical coupled-channel formalism for processes $\pi N \to KY$ and
$\gamma N \to KY$ is presented which provides a comprehensive investigation of
recent data on the $\gamma p \to K^+ \Lambda$ reaction. The non-resonant
interactions within the subspace $KY\oplus\pi N$ are derived from effective
Lagrangians, using a unitary transformation method. The calculations of
photoproduction amplitudes are simplified by casting the coupled-channel
equations into a form such that the empirical $\gamma N \to \pi N$ amplitudes
are input and only the parameters associated with the $KY$ channel are
determined by performing $\chi^2$-fits to all of the available data for $\pi^-
p \to K^\circ\Lambda, K^\circ\Sigma^\circ$ and $\gamma p \to K^+\Lambda$. Good
agreement between our models and those data are obtained. In the fits to $\pi N
\to KY$ channels, most of the parameters are constrained within $\pm 20%$ of
the values given by the Particle Data Group and/or quark model predictions,
while for $\gamma p \to K^+ \Lambda$ parameters, ranges compatible with broken
$SU(6)\otimes O(3)$ symmetry are imposed. The main reaction mechanisms in $K^+
\Lambda$ photoproduction are singled out and issues related to newly suggested
resonances $S_{11}$, $P_{13}$, and $D_{13}$ are studied. Results illustrating
the importance of using a coupled-channel treatment are reported. Meson cloud
effects on the $\gamma N \to N^*$ transitions are also discussed.

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The categories of this paper are: q-alg
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph