Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for Direct CP Violation in K+-->pi+-pi+pi- Decays by NA48/2   First preliminary measurement of the direct CP-violating parameter Ag by the
NA48/2 experiment at CERN SPS is presented. Using more than 1.6 billions of
charged kaon decays into three charged pions, the charge asymmetry in the
K+-->pi+-pi+pi- Dalitz plot slope, Ag, has been measured to Ag = (0.5 +- 3.8) x
10^-4. This result is more than an order of magnitude more precise than results
of previous experiments.

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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: math
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg