Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Formation of $\Sigma \pi$ pairs in nuclear captures of K$^-$ mesons   The capture of K$^-$ mesons on nucleons bound in nuclei offer a chance to
study the $\Sigma \pi$ pairs below the kinematic threshold of the
$\bar{\mathrm{K}}$N systems. Various hyperon-pion charged combination are
presently under investigation by AMADEUS. These data allow to test both isospin
0 and 1 amplitudes giving the possibility to detect the structure of resonant
$\Lambda$(1405) state. Contrasted against similar electro-production data, it
is possible to detect changes of $\Lambda$(1405) in nuclear media. Expected
spectra and their uncertainties are calculated.

5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th