Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of $K^{0}-\bar{K}^{0}$ Mixing on $CP$ Asymmetries in Weak Decays
  of $D$ and $B$ Mesons   Within the standard electroweak model we carry out an instructive analysis of
the effect of $K^{0}-\bar{K}^{0}$ mixing on $CP$ asymmetries in some weak decay
modes of $D^{\pm}$ and $\stackrel{(-)}{B}$$^{0}_{d}$ mesons. We point out that
a clean signal of $CP$ violation with magnitude of 2Re($\epsilon$) $\approx
3.3\times 10^{-3}$ can manifest in the semileptonic decays $D^{+}\rightarrow
l^{+}\nu^{~}_{l}K_{S}$ ($K_{L}$) vs $D^{-}\rightarrow
l^{-}\bar{\nu}^{~}_{l}K_{S}$ ($K_{L}$). The $CP$ asymmetries are also dominated
by 2Re($\epsilon$) in the two-body nonleptonic decays $D^{\pm} \rightarrow
(\pi^{\pm}, \rho^{\pm}, a^{\pm}_{1})+ (K_{S}, K_{L})$ and in the multi-body
processes $D^{\pm}\rightarrow \pi^{\pm}+n_{0}\pi^{0}+n_{\pm}
(\pi^{\pm}\pi^{\mp})+ (K_{S}, K_{L})$, where $n_{0}$ and $n_{\pm}$ are
integers. It is possible to observe such $CP$-violating signals with about
$10^{7}$ $D^{\pm}$ events at $\tau$-charm factories or hadron machines. Finally
we show that the $CP$ asymmetry induced by Re($\epsilon$) may compete with
those from $B^{0}_{d}-\bar{B}^{0}_{d}$ mixing and final-state interactions in
the semi-inclusive and exclusive decays $B_{d}\rightarrow X(c\bar{c})+(K_{S},
K_{L})$ on the $\Upsilon (4S)$ resonance.

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The categories of this paper are: stat
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: math
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc