Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Associated strangeness production at threshold   The associated strangeness dissociation at threshold has been studied at the
COSY-11 facility measuring the hyperon - and the K+K- meson pair production.
Measurements of the near threshold Lambda and Sigma0 production via the pp ->
pK+ Lambda / Sigma0 reaction at COSY-11 have shown that the Lambda / Sigma0
cross section ratio exceeds the value at high excess energies (Q >= 300 MeV) by
an order of magnitude. For a better understanding additional data have been
taken between 13 MeV and 60 MeV excess energy.
  The near threshold production of the charged kaon-antikaon pair is related to
the discussion about the nature of the scalar states in the 1 GeV/c^2 mass
range, i.e. the f0(980) and a0(980). The interpretation as a K anti-K molecule
is strongly dependent on the K anti-K interaction which can be studied via the
production channel. A first total cross section value on the reaction pp ->
ppK+K- at an excess energy of 17 MeV i.e. below the phi production threshold
was measured.

9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph