Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of the hadronic production of kaon pairs below the threshold for
  the phi meson   The near threshold production of K+K- pairs in proton-proton collisions has
been investigated at the cooler synchrotron COSY below and above the threshold
for the $\phi$ meson using the COSY-11 and ANKE facilities, respectively. The
excitation function determined for the pp-->ppK+K- reaction revealed a
statistically significant enhancement close to the threshold which may
plausibly be assigned to the influence of the K-p interaction. In addition,
observed consistently by both groups, a strong enhancement at low values of the
ratio of the K-p to K+p invariant mass distributions shows that the proton
interacts much stronger with K- than with K+. In this report we focus on the
measurements performed by the COSY-11 collaboration. We explain the
experimental method used and present main results of completed analyses as well
as a new qualitative elaboration of the ppK+K- events population on the
Goldhaber plot. We conclude with the observation that event densities increase
at the region where the influence from the K+K- interaction is expected.

27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org