Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The kaon optical potential modified by \Theta^+ Pentaquark excitation   We study the kaon nuclear optical potential including the effect of the
\Theta^+ pentaquark in a self-consistent approach, starting from an extension
of the Juelich meson-exchange potential as bare kaon-nucleon interaction.
Significant differences between a fully self-consistent calculation and the
low-density T\rho approximation are observed. Whereas te influence of the KN ->
\Theta^+ absorption process is found to be negligible, due to the small
\Theta^+ KN coupling, the two-nucleon mechanism (KNN -> \Theta^+ N), estimated
from the two-meson coupling of the pentaquark, provides the necessary
additional kaon absorption to reconcile with data the systematically low
theoretical K^+ nucleus reaction cross sections.

4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom