Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some exact results on CP and CPT violations in a $C=-1$ entangled
  pseudoscalar neutral meson pair   We consider neutral pseudoscalar mesons in an entangled or
Einstein-Podolsky-Rosen state with $C=-1$. Due to quantum entanglement and
antisymmetry of this state, the rates of the joint decays of the meson pair
display various interesting features, as is well known. As functions of CP and
CPT violating parameters, here we obtain some exact results about the joint
decay rates and their asymmetries for a given time difference defined for joint
decays to flavor eigenstates, as well as those for joint decays to CP
eigenstates. The entanglement allows a meaningful and useful definition of the
transition amplitude from a CP eigenstate of a meson. These results yield
useful information and criteria on CP and CPT violations.

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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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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: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: eess