Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutral strange particle production in deep inelastic scattering at HERA   This paper presents measurements of \k\ and \lam\ production in neutral
current, deep inelastic scattering of 26.7 GeV electrons and 820 GeV protons in
the kinematic range $ 10 < Q^{2} < 640 $ GeV$^2$, $0.0003 < x < 0.01$, and $y >
0.04$. Average multiplicities for \k\ and \lam\ production are determined for
transverse momenta \ \ptr\ $> 0.5 $ GeV and pseudorapidities $\left| \eta
\right| < 1.3$. The multiplicities favour a stronger strange to light quark
suppression in the fragmentation chain than found in $e^+ e^-$ experiments. The
production properties of \k's in events with and without a large rapidity gap
with respect to the proton direction are compared. The ratio of neutral \k's to
charged particles per event in the measured kinematic range is, within the
present statistics, the same in both samples.

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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-th
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: cond-mat