Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New results on direct CP violation in charged kaon decays by NA48/2   The NA48/2 result, based on the data collected during the 2003 run, on direct
CP violation in $K^{\pm}\to\pi^{\pm}\pi^0\pi^0$ decay is presented. The main
goal of the experiment is to reach a sensitivity at level of $10^{-4}$ in the
measurement of the charge asymmetry parameter $A_g=(g^+-g^-)/(g^++g^-)$, where
$g$ is the \emph{linear slope} of the Dalitz plot in the $K\to 3\pi$ decay.
Thanks to the simultaneous collection of the two kaon charges and to the high
resolution of the main sub-detectors, the systematics uncertainties are kept
under the statistical error level. The experimental procedure, the analysis
technique and the main systematics are discussed to present the final result $$
A_g=(1.8\pm2.6)\times 10^{-4} $$ This result based on more than $45\cdot10^6$
events, correspondig to one half of the whole two year data taking, is about an
order of magnitude more precise with respect to the previous measurement.

19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
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The categories of this paper are: stat
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom