Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of CP asymmetries in $D^0 \rightarrow hh$ decays   The latest measurements of the individual time-integrated CP asymmetry in the
Cabibbo-suppressed decays $D^0\rightarrow hh$ decays are presented. The results
are based on $pp$ collision data, corresponding to an integrated luminosity of
$3 fb^{-1}$, collected with the LHCb detector at centre-of-mass energies of 7
and 8 TeV. A combination of the asymmetries using both prompt and secondary
charm decays is presented $A_{CP}(K^-K^+) = (0.04 \pm 0.12(stat) \pm
0.10(syst))%$; $A_{CP}(\pi^-\pi^+) = (0.07 \pm 0.14(stat) \pm 0.11(syst))$.
These are the most precise measurements from a single experiment. The result
for $A_{CP}(K^-K^+)$ is the most precise determination of a time-integrated CP
asymmetry in the charm sector to date, and neither measurement shows evidence
of CP asymmetry.

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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ
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The categories of this paper are: stat
3
The categories of this paper are: physics
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The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th