Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Research News -- Quantum Mechanical Entanglement and Tests of CPT
  Theorem with Neutral Mesons at e+ e- Colliders   We review the recent confirmation of quantum entanglement in e+ e- collisions
at the BELLE experiment at KEK-B in Japan with neutral B- mesons, and at the
KLOE experiment at the DAFNE in Italy with neutral K- mesons. Such effects in
the latter system seen already in proton-antiproton collisions by the CPLEAR
experiment are also reviewed for purposes of comparison. In addition, the KLOE
experiment provides new tests of the CPT theorem and are briefly discussed.

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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th