Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Limitations of T Invariance in K Decays   Data from the CPLEAR collaboration coupled with the assumption that the
Bell-Steinberger relation holds have provided {\em direct} evidence for
\ot~violation. In this note we investigate what we can say about \ot~violation
{\em without} such an assumption.
  We show that both the modulus and the phase of $\eta_{+-}$ can be reproduced
with \ot~{\em invariant} dynamics through finetuning \cpt~breaking. The large
\ot~odd correlation observed by the KTeV collaboration in $K_L \to \pi ^+\pi ^-
e^+ e^-$ thus does not yield direct evidence for \ot~violation. In such a world
the phase of $\frac{\epsilon'}{\epsilon}$ is $\delta_2-\delta_0-\phi_{SW}\sim
-(85.5\pm 4)^\circ$. Also, $K^{\pm} \to \pi ^{\pm} \pi ^0$ could exhibit a
\cpt~asymmetry of up to few$\times 10^{-3}$ without upsetting any known bound.

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The categories of this paper are: eess
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: econ
37
The categories of this paper are: supr-con