Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: QCD factorization for $B\to\pi K$ decays   We examine some consequences of the QCD factorization approach to
non-leptonic B decays into $\pi K$ and $\pi \pi$ final states, including a set
of enhanced power corrections. Among the robust predictions of the approach we
find small strong-interaction phases (with one notable exception) and a pattern
of CP-averaged branching fractions, which in some cases differ significantly
from the current central values reported by the CLEO Collaboration.

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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ
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The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org