Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New CP-violating parameters in cascade decays   We consider decay chains of the type P -> M + ... -> f + ..., where M is a
neutral meson that may mix with its antiparticle Mbar, before decaying into the
final state f. P may be either a heavier neutral meson or a charged meson. We
perform a rephasing-invariant analysis of the quantities that show up in such
cascade decays. If the decay P -> M + ... (or the decay P -> Mbar + ...) is
forbidden, we find the usual lambda_f parameters describing the interference
between the mixing of a neutral meson system and the decay from that system
into the final state f. However, when both the P -> M + ... and P -> Mbar + ...
decays are allowed, we find a new class of rephasing-invariant parameters,
xi_i, that measure the interference between the mixing of a neutral meson
system and the decay from the initial state *into that system*. We show that
the quantities lambda_f and xi_i are necessary and sufficient to describe all
the interference effects present in the most general cascade decay. We discuss
the various cascade decays in turn, highlighting the special features of each
one.

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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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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: cmp-lg