Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bounds on CPT and Lorentz violation from experiments with kaons   Possible signals for indirect CPT violation arising in experiments with
neutral kaons are considered in the context of a general CPT- and
Lorentz-violating standard-model extension. Certain CPT observables can depend
on the meson momentum and exhibit sidereal variations in time. Any
leading-order CPT violation would be controlled by four parameters that can be
separately constrained in appropriate experiments. Recent experiments bound
certain combinations of these parameters at the level of about $10^{-20}$ GeV.

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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
2
The categories of this paper are: math
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci