Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuclear medium modifications of properties of kaons measured around
  threshold with FOPI   We report on the investigation of modifications of basic properties of K$^+$
and K$^-$ mesons emitted from collisions of Ni+Ni at beam energy of 1.91A GeV.
Experimental K$^-$/K$^+$ ratio are presented in a wide range of phase space
parameterized by kinetic energy and emission angle in the nucleon-nucleon
centre of mass. The $v_1$ component of the azimuthal distribution was extracted
as a function of rapidity and transverse momentum for central, and
semi-peripheral collisions. A comparison of these patterns with the HSD
transport model favours the existence of the kaon-nucleon in-medium potential.
For the IQMD model, this interaction scenario is confirmed in case of K$^-$,
whereas for K$^+$ the picture is less clear.

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The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
2
The categories of this paper are: math
3
The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph