Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiative Kaon Decays and $CP$ Violation   The amplitudes of $K \rightarrow \pi \gamma^* \rightarrow \pi e^+e^-$ and $K
\rightarrow \pi \pi \gamma$ decays have been calculated within chiral
Lagrangian approach including higher-order derivative terms and meson loops.
The selfconsistency of the simultaneous description of the experimental data on
the nonleptonic and radiative kaon decays have been demonstrated. We estimate
the effects of ``indirect'' and ``direct'' $CP$-violation in $K^0_L \rightarrow
\pi^0 e^+e^-$ decays and discuss $CP$-violating charge asymmetries in $K^{\pm}
\rightarrow \pi^{\pm} \pi^0 \gamma$ decays.

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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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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: q-fin
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The categories of this paper are: physics
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The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: eess